4. Register configuration
Table 9-3 shows the register configuration of timer A.
Table 9-3 Timer A Registers
Name
Abbrev.
TMA
R/W
R/W
R
Initial Value
H'10
Address
H'FFB0
H'FFB1
H'FFFA
H'FF92
Timer mode register A
Timer counter A
TCA
H'00
Clock stop register 1
Subclock output select register
CKSTPR1
CWOSR
R/W
R/W
H'FF
H'FE
9.2.2
Register Descriptions
1. Timer mode register A (TMA)
Bit
7
TMA7
0
6
TMA6
0
5
TMA5
0
4
—
1
3
2
1
0
TMA3
0
TMA2
0
TMA1
0
TMA0
0
Initial value
Read/Write
R/W
R/W
R/W
—
R/W
R/W
R/W
R/W
TMA is an 8-bit read/write register for selecting the prescaler, input clock, and output clock.
Upon reset, TMA is initialized to H'10.
183
ETC [ ETC ]
