tmp86fp24 TOSHIBA Semiconductor CORPORATION, tmp86fp24 Datasheet - Page 152

• Manufacturer Part Number: tmp86fp24
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.15 Program Patch Logic
2.15.1
a bug.
jump mode, the three consecutive bytes starting at the address specified in the program
correction address registers can be replaced with an absolute jump instruction. In the data
replacement mode, the data at the address specified in the program correction address registers
can be replaced with the specified one or two data.
Note 1: Before using the program patch logic, a routine for this logic must be embedded in the initial
Note 2: To set the jump target in the RAM for the address jump mode, an address trap of RAM must
Address bus
The program patch logic provides a function to fix the program code in the on-chip ROM with
This logic has two modes of operation: Address jump and data replacement. In the address
The two modes of operation allow up to four memory locations to be patched.
Configuration
routine.
be disabled through the WDTCR1 and WDTCR2 before setting the program correction
control register (ROMCCR).
Enable control
RCAD0H RCAD0L
ROMCCR
Mode selection
Read signal
Figure 2.15.1 Program Patch Logic
Compa-
rator
Address  1
Address  2
Data selection
86FP24-150
ROM chip select signal
FEH
RCDT0H
circuit
ROM
Read signal
RCDT0L
BANK0
8
BANK1
BANK2
8
BANK3
8
8
Data bus
TMP86FP24
2007-08-24