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APPENDIX F Precautions on Handling
APPENDIX F Precautions on Handling
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Common Items
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Clock controller
When inputting "L" to INIT, the oscillation stabilization wait time must be secured.
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Switching functions between port and pin
When a port serves both as a port and a pin, port and pin functions are switched by PFR (Port Function
Register). However, a bus pin is switched by external bus settings.
Note: External bus mode is not supported by the MB91260B series.
●
D-bus memory
Do not set the code area in the D-bus memory.
No instruction fetch to the D-bus memory is executed. If instruction fetch to the D-bus memory is
executed, incorrect data will be interpreted as a code, causing a runaway condition.
●
Low-power consumption mode
(1) To switch to standby mode, use synchronous standby mode (set by the SYNCS bit, that is bit8 of the
TBCR, time-base counter control register) and be sure to use the following sequence:
/* Writing STCR */
ldi
#_STCR, R0
; STCR register (0x0481)
ldi
#Val_of_Stby, rl
; Val_of_Stby is the write data to STCR.
stb
rl,@r0
; Writing to STCR
/* Writing STBR */
ldi
#_CTBR, r2
; CTBR register (0x0483)
ldi
#0xA5, rl
; Clear command (1)
stb
rl,@r2
; Writing A5 to CTBR
ldi
#0xA5, rl
; Clear command (2)
stb
rl,@r2
; Writing A5 to CTBR
/* Clearing the time base counter in here */
ldub
@r0, rl
; Reading STCR
/* Starting synchronous standby transition */
ldub
@r0, rl
; Reading dummy STCR
nop
; NOP
×
5 for timing adjustment
nop
nop
nop
nop
(2) When using the monitor debugger, DO NOT:
Summary of Contents for FR60Lite
Page 3: ......
Page 5: ......
Page 115: ...100 CHAPTER 3 CPU AND CONTROL UNITS ...
Page 127: ...112 CHAPTER 4 I O PORTS ...
Page 143: ...128 CHAPTER 5 INTERRUPT CONTROLLER ...
Page 155: ...140 CHAPTER 6 EXTERNAL INTERRUPT AND NMI CONTROLLER ...
Page 197: ...182 CHAPTER 9 PPG Programmable Pulse Generator ...
Page 337: ...322 CHAPTER 13 UART ...
Page 417: ...402 CHAPTER 16 DMAC DMA Controller ...
Page 445: ...430 CHAPTER 17 FLASH MEMORY ...
Page 451: ...436 CHAPTER 18 SERIAL PROGRAMMING CONNECTION ...
Page 493: ...478 APPENDIX F Precautions on Handling ...
Page 494: ...479 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 507: ...492 INDEX ...
Page 509: ......