Section 9 Timers
Rev. 7.00 Mar 10, 2005 page 248 of 652
REJ09B0042-0700
Register Configuration
Table 9.2 shows the register configuration of timer A.
Table 9.2 Timer A Registers
Name Abbr. R/W Initial Value Address
Timer mode register A TMA R/W — H'FFB0
Timer counter A TCA R H'00 H'FFB1
Clock stop register 1 CKSTPR1 R/W H'FF H'FFFA
9.2.2 Register Descriptions
Timer Mode Register A (TMA)
Bit
Initial value
Read/Write
7


W
6


W
5


W
4

1

3
TMA3
0
R/W
0
TMA0
0
R/W
2
TMA2
0
R/W
1
TMA1
0
R/W
TMA is an 8-bit read/write register for selecting the prescaler, and input clock.
Bits 7 to 5—Reserved
Bits 7 to 5 are reserved; only 0 can be written to these bits.
Bit 4—Reserved
Bit 4 is reserved; it is always read as 1, and cannot be modified.
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