S-7760A Datasheet, PDF (14/53 Pages) Seiko Instruments Inc – PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E2PROM CIRCUIT)

PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E²PROM CIRCUIT)
S-7760A
Rev.1.3_00
4. Control port register
Control port register is an 8-bit register. Users can set output data which is from output ports (DO7 to 0). If data is “1”,
output is “H”, and if it is “0”, output is “L”. This register is the one to be reloaded. Data in this register does not change
even if output from the port is inverted by timer action.
B7
B6
B5
B4
B3
B2
B1
B0
MSB
CTR7
CTR6
CTR5
CTR4
CTR3
CTR2
CTR1
CTR0
LSB
R/W
R/W
R/W
R/W
R/W
R/W
Figure 15 Control Port Register
R/W
R/W
5. Timer scale setting register
The lower 4 bits are registers for timer scale setting. Users can set, whether short-time or long-time, time reference
(scale) for the delay time setting at each port DO3 to 0.
The higher 4 bits are Read/Write-able bits, however, they do not affect on circuit action because DO7 to 4 have fixed
output. This register is the one to be reloaded.
B7
B6
B5
B4
B3
B2
B1
B0
MSB
TS7
TS6
TS5
TS4
TS3
TS2
TS1
TS0
LSB
R/W
R/W
R/W
R/W
R/W
R/W
TSn = 1 : Timer scale DO3 to 0 Short-time setting
TSn = 0 : Timer scale DO3 to 0 Long-time setting
Figure 16 Timer Scale Setting Register
R/W
R/W
14
Seiko Instruments Inc.