tmp88cs34ng TOSHIBA Semiconductor CORPORATION, tmp88cs34ng Datasheet - Page 35

• Manufacturer Part Number: tmp88cs34ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

1.7
ROM Corrective Function
address in the ROM with the jump instruction to branch into the RAM area where the patched
codes (Program Jump Mode). The other is to replace a byte or a word (2 or 3 bytes) length data
in the ROM with the patched data (Data Replacement Mode). Four independent location can be
patched.
Note 1: When use ROM corrective circuit, it is necessary to contain a program which operates to load
Note 2: The address of an instruction for IDLE mode cannot be specificated as start address of
Note 3: The BM88CS34N0A-M15 does not support the ROM corrective circuit. Use the TMP88PS34
Example:
The ROM corrective function can patch the part (s) of on-chip ROM with some bugs.
The ROM corrective function have two modes. One is to replaced the instruction on a certain
patched program and/or replacement data from external memory into an internal data RAM
in an initial routine.
corrective area.
to debug a program of this circuit.
ROMCDR
ROM corrective circuit
RAM
ROMCDR
Serial
Bus
Interface
88CS34-35
• Correction mode
• Correction code
• Patch program
TMP88CS34/CP34
2007-09-12