Renesas 7700 FAMILY User Manual page 530

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 31
UART1 baud rate register (address 39
UART0 transmit buffer register (addresses 33
UART1 transmit buffer register (addresses 3B
Timer A4 two-phase pulse signal processing select bit (bit 7 at address 44
Timer A3 two-phase pulse signal processing select bit (bit 6 at address 44
Timer A2 two-phase pulse signal processing select bit (bit 5 at address 44
)
16
)
16
, 32
16
, 3A
16
7751 Group User's Manual
APPENDIX
Appendix 9. Q & A
)
16
)
16
SFR
)
16
)
16
)
16
20–79