Chapter 55 · Platform Conversion, EEPROM & Flash Integrity

Flash Map & Task Tree

Complete flash topology, sector table, and the real-time task call tree.

Calibration symbols

KFFDLGO NMOT_W ARMIN TI_B1 ZWIST DFPM G186 RL_W ASR G28 MSR N80

ECUs covered

—

Size

12 symbols · 2 diagrams · ~809 words

Complete flash topology, sector table, and the real-time task call tree.

Reverse engineering, firmware disassembly, and low-level code patching on Bosch ME7.5 require an exact topographical understanding of how physical parallel flash memory, internal microcontroller RAM, and execution task loops are structured.

The standard 1024 KB Bosch ME7.5 ECU utilizes an AMD AM29F800BB or ST Microelectronics M29F800FB CMOS 5.0V parallel flash EEPROM, interfaced over a 16-bit multiplexed bus to the Siemens/Infineon C167CR-LM 16-bit microcontroller. Below is the definitive physical flash memory map, C167 Data Page Pointer (DPP) translation matrix, and real-time execution task hierarchy governing the entire operating system.

┌──────────────────────────────────────────────────────────────────────────────────────────────────┐
│                   BOSCH ME7.5 1024 KB FLASH TOPOGRAPHY & SECTOR MAP                              │
├──────────────────────────────────────────────────────────────────────────────────────────────────┤
│                                                                                                  │
│   Offset Range          Size     Sector Name / Memory Allocation        Primary Architectural Role│
│   ══════════════════════════════════════════════════════════════════════════════════════════════ │
│   0x000000 - 0x003FFF   16 KB    Sector 0 (SA0 - Boot Sector)           C167 Reset & IRQ Vectors │
│   0x004000 - 0x005FFF    8 KB    Sector 1 (SA1 - Parameter Storage)     Hardware Config & EEP Mir│
│   0x006000 - 0x007FFF    8 KB    Sector 2 (SA2 - KWP2000 Protocol)      Bootloader & Flashing Com│
│   0x008000 - 0x00FFFF   32 KB    Sector 3 (SA3 - System Initialization) Microcontroller Startup  │
│   0x010000 - 0x01FFFF   64 KB    Sector 4 (SA4 - CALIBRATION DATA)      ★ 100% OF MAPS & CONSTS  │
│   0x020000 - 0x02FFFF   64 KB    Sector 5 (SA5 - ASW Core Code Part 1)  Engine Timing & Spark    │
│   0x030000 - 0x03FFFF   64 KB    Sector 6 (SA6 - ASW Core Code Part 2)  Fuel Injection & Lambda  │
│   0x040000 - 0x04FFFF   64 KB    Sector 7 (SA7 - ASW Core Code Part 3)  E-Gas & Torque Model     │
│   0x050000 - 0x05FFFF   64 KB    Sector 8 (SA8 - ASW Core Code Part 4)  Boost Control (LDRPID)   │
│   0x060000 - 0x06FFFF   64 KB    Sector 9 (SA9 - ASW Core Code Part 5)  Knock Sensing & Thermal  │
│   0x070000 - 0x07FFFF   64 KB    Sector 10 (SA10 - ASW Core Part 6)     Custom Code Hook Area    │
│   0x080000 - 0x08FFFF   64 KB    Sector 11 (SA11 - ASW Extended Part 7) Emissions & Secondary Air│
│   0x090000 - 0x09FFFF   64 KB    Sector 12 (SA12 - ASW Extended Part 8) EVAP & Tank Ventilation │
│   0x0A0000 - 0x0AFFFF   64 KB    Sector 13 (SA13 - ASW Extended Part 9) Drivetrain CAN Gateway   │
│   0x0B0000 - 0x0BFFFF   64 KB    Sector 14 (SA14 - DFPM Diagnostics 1)  Fault Path Evaluators    │
│   0x0C0000 - 0x0CFFFF   64 KB    Sector 15 (SA15 - DFPM Diagnostics 2)  Readiness & Freeze-Frames│
│   0x0D0000 - 0x0DFFFF   64 KB    Sector 16 (SA16 - OBD-II Tables)       SAE P-Code Lookup Arrays │
│   0x0E0000 - 0x0EFFFF   64 KB    Sector 17 (SA17 - Extended Drivers)    Analog ADC Sensor Drivers│
│   0x0F0000 - 0x0FFFFF   64 KB    Sector 18 (SA18 - End Sector)          Main Checksum Signatures │
└──────────────────────────────────────────────────────────────────────────────────────────────────┘

55.1. C167CR Memory Segmentation & Data Page Pointer (DPP) Architecture#

The Siemens/Infineon C167CR utilizes a segmented memory architecture to address up to 16\text{ Megabytes} of linear address space using 16-bit registers. Memory is partitioned into 16\text{ KB} segments (Pages 0\dots 1023).

Four Data Page Pointers (DPP0, DPP1, DPP2, DPP3) map 14-bit data addresses inside instructions to full 24-bit physical addresses:

DPP0 (Default: 0x0000): Addresses physical page 0x000000 - 0x003FFF (Reset vectors, system core).
DPP1 (Default: 0x0004): Addresses physical page 0x010000 - 0x013FFF (Calibration data segment, maps and curves).
DPP2 (Default: 0x00E0): Addresses physical internal high-speed dual-port RAM 0x380000 - 0x383FFF (0x8000 | RAM_Offset). Contains real-time runtime calculation variables (nmot_w, rl_w, pvdss_w, zwist).
DPP3 (Default: 0x0003): Addresses Special Function Registers (SFRs) and Bit-addressable RAM 0x00C000 - 0x00FFFF (specifically 0x00FD00 - 0x00FDFF for SFRs, operands prefixed with 0xFDxx).

55.2. Master Real-Time Operating System Task Queue & Function Call Tree#

Bosch ME7.5 runs a preemptive, priority-driven real-time cyclic operating system. Subsystems do not execute randomly; they are invoked on strict deterministic timebases:

┌──────────────────────────────────────────────────────────────────────────────────────────────────┐
│                             BOSCH ME7.5 CYCLIC TASK SCHEDULER                                    │
├──────────────────────────────────────────────────────────────────────────────────────────────────┤
│                                                                                                  │
│   1. Crankshaft-Synchronous Interrupt Service Routine (Angle-Based: Every 180° KW):             │
│      ├── CAPCOM Capture: Measure exact tooth edge timing (G28 sensor) -> Calculate T_seg         │
│      ├── ZW_BERECHNUNG: Compute instantaneous ignition dwell & spark advance angle (dwk_w)       │
│      ├── EV_STEUERUNG: Calculate precise injection start angle (SOI) & pulse duration (ti_b1)    │
│      └── KR_ERFASSUNG: Read knock sensor ADC integrator windows for completed cylinder stroke    │
│                                                                                                  │
│   2. 10 Millisecond Fast Synchronous Task Loop (100 Hz High-Priority):                           │
│      ├── DVE_REGELUNG: Electronic Throttle Body servo motor PID control loop (G186 motor drive)  │
│      ├── MD_MSR: Drivetrain anti-slip regulation (ASR) & engine drag torque (MSR) interventions   │
│      ├── FUELLUNG_SYN: High-speed intake manifold pressure & mass airflow integration            │
│      └── DWELL_CONTROL: High-voltage ignition coil charge timing compensation                    │
│                                                                                                  │
│   3. 20 Millisecond Intermediate Task Loop (50 Hz Vehicle Dynamics):                            │
│      ├── LDRPID: Closed-loop turbocharger boost pressure PID governor & wastegate linearization  │
│      ├── TORQUE_MONITOR: Level 2 safety monitoring & pedal-to-torque plausibility check          │
│      ├── WANDFILM: Dynamic intake manifold wall-wetting fuel puddle compensation                 │
│      └── ANTI_JERK: Driveline oscillation damping filter (ARMIN / KFFDLGO)                       │
│                                                                                                  │
│   4. 100 Millisecond Slow Supervisory Task Loop (10 Hz Drivetrain & Emissions):                  │
│      ├── LAMBDA_CLOSED_LOOP: Continuous fuel trimming from upstream wideband sensor (LSU 4.2)   │
│      ├── TANK_PURGE: Evaporative canister purge valve modulation (N80) & FTE vapor observer      │
│      ├── THERMAL_MANAGEMENT: Radiator cooling fan speed commands & electric thermostat (F265)    │
│      └── CAN_TRANSMIT: Broadcast powertrain data frames (0x280, 0x288, 0x380, 0x480)             │
│                                                                                                  │
│   5. Background Idle & Self-Test Loop (0 Hz Continuous Run-Queue):                               │
│      ├── DFPM: Diagnostic Fault Path Manager cycle (Evaluates B_kat, B_sls, B_te fault counters) │
│      ├── READINESS: Update legal OBD-II readiness monitor status bits                            │
│      └── CHECKSUM_SELF_TEST: Continuous background ROM cyclic redundancy checks (CRC32)          │
└──────────────────────────────────────────────────────────────────────────────────────────────────┘

Cross-referenced on shared calibration symbols, not on subject matter — these are the chapters that touch the same maps.