7702 Datasheet, PDF (467/522 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER

APPENDIX
Appendix 3. Control registers
One-shot pulse mode
b7 b6 b5 b4 b3 b2 b1 b0
0
1 1 0 ^{Timer Ai mode register (i = 0 to 4) (Addresses 5616 to 5A16)}
Bit
Bit name
0 Operating mode select bits
1@
Functions
b1 b0
1 0 : One-shot pulse mode
At reset _RW
0 RW
0 RW
2 ^{Fix this bit to “1” in one-shot pulse mode.}
0 RW
3 Trigger select bits
4
b4 b3
0 0 : Writing “1” to one-shot start register
0 RW
0 1 (TAiIN pin functions as a prog-
rammable I/O port.)
1 0 : Falling edge of TAiIN pin’s input signal
0 RW
1 1 : Rising edge of TAiIN pin’s input signal
5 Fix this bit to “0” in one-shot pulse mode.
6 Count source select bits
7
b7 b6
0 0 : f2
0 1 : f16
1 0 : f64
1 1 : f512
0 RW
0 RW
0
RW
(b15)
b7
(b8)
b0 b7
Timer A0 register (Addresses 4716, 4616)
b0 _{Timer A1 register (Addresses 4916, 4816)}
Timer A2 register (Addresses 4B16, 4A16)
Timer A3 register (Addresses 4D16, 4C16)
Timer A4 register (Addresses 4F16, 4E16)
Bit
Functions
At reset RW
15 to 0 These bits can be set to “000116” to “FFFF16.” ^Undefined WO
Assuming that the set value = n, the “H” level
width of the one-shot pulse output from the
TAiOUT pin is expressed as follows : n / fi.
fi: Frequency of count source (f2, f16, f64, or f512)
7702/7703 Group User’s Manual
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