TMP91C824
91C824-232
2008-02-20
5.
Table of SFRs
The SFRs (Special function registers) include the I/O ports and peripheral control registers
allocated to the 4-Kbyte address space from 000FE0H to 000FFFH.
(1)
I/O port
(2)
I/O port control
(3)
Interrupt control
(4)
Chip select/wait control
(5)
Clock gear
(6)
DFM (Clock doubler)
(7)
8-bit timer
(8)
UART/Serial channel
(9)
I
2
C bus/serial channel
(10)
AD converter
(11)
Watchdog timer
(12)
RTC (Real time clock)
(13)
Melody/alarm generator
(14)
MMU
Note: Prohibit RMW in the table means that you cannot use RMW instructions on these register.
Example: When setting bit0 only of the register PxCR, the instruction SET 0, (PxCR) cannot
be used. The LD (Transfer) instruction must be used to write all eight bits.
Read/Write
R/W: Both read and write are possible.
R:
Only read is possible.
W:
Only write is possible.
W
*
: Both read and write are possible (when this bit is read as 1).
Prohibit RMW: Read-modify-write instructions are prohibited. (The EX, ADD, ADC, BUS,
SBC, INC, DEC, AND, OR, XOR, STCF, RES, SET, CHG, TSET, RLC, RRC,
RL, RR, SLA, SRA, SLL, SRL, RLD and RRD instruction are read-modify-
write instructions.)
R/W
*
: Read-modify-write instructions are prohibited when controlling the pull-up resistor.
Symbol
Address
Name
7
6
1
0
Bit symbol
Read/Write
Initial value after reset
Remarks
Table layout