S-7750C Datasheet, PDF (13/44 Pages) Seiko Instruments Inc – PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E2PROM CIRCUIT)

PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E²PROM CIRCUIT)
Rev.1.1_00
S-7750C
4. Control port
A control port register is an 8-bit register. Users can set output at each output port (DO7 to DO0). The data in this
register is “1”, output from port is “H”. If “0”, output from port is “L”. This register is the one to be reloaded by
command.
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
R/W
R/W
CTR7 to CTR0 = 0 : output from DO7 to DO0 = “L”
CTR7 to CTR0 = 1 : output from DO7 to DO0 = “H”
Figure 12 Control Port Register / E²PROM
5. Timer scale setting
A timer scale setting register is an 8-bit register. Output at each port (DO7 to DO0) is inverted in delay time; using this
register, users can set time reference of delay time (scale) either in a short-time or a long-time setting.
Setting “0” in the data in this register, sets time reference (scale) as a long period setting, if “1”, sets time reference
(scale) as a short-time setting. This register is the one to be reloaded by command.
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
R/W
R/W
TS7 to TS0 = 0 : Timer scale DO7 to DO0 Long-time setting
TS7 to TS0 = 1 : Timer scale DO7 to DO0 Short-time setting
Figure 13 Timer Scale Setting Register / E²PROM
6. Free area 1, Free area 2
Both of free area 1 and 2 are 8-bit registers. Users are able to use these registers freely, and these registers do not
affect on other functions of the S-7750C. These free area 1 and 2 registers are the ones to be reloaded by command.
B7
B6
B5
B4
B3
B2
B1
B0
MSB
F17
F16
F15
F14
F13
F12
F11
F10
LSB
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Figure 14 Free Area 1 Register / E²PROM
R/W
B7
B6
B5
B4
B3
B2
B1
B0
MSB
F27
F26
F25
F24
F23
F22
F21
F20
LSB
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Figure 15 Free Area 2 Register / E²PROM
R/W
Seiko Instruments Inc.
13