7751 Datasheet, PDF (530/540 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER

APPENDIX
Appendix 9. Q & A
SFR
Q
Is there any SFR for which instructions that can be used to set registers or bits are limited?
A
Use the STA or LDM instruction to set the registers or the bits listed below. Do not use read-
modify-write instructions (i.e., CLB, SEB, INC, DEC, ASL, ASR, LSR, ROL, and ROR).
UART0 baud rate register (address 3116)
UART1 baud rate register (address 3916)
UART0 transmit buffer register (addresses 3316, 3216)
UART1 transmit buffer register (addresses 3B16, 3A16)
Timer A4 two-phase pulse signal processing select bit (bit 7 at address 4416)
Timer A3 two-phase pulse signal processing select bit (bit 6 at address 4416)
Timer A2 two-phase pulse signal processing select bit (bit 5 at address 4416)
7751 Group User’s Manual
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