S-7760A Datasheet, PDF (12/53 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
„ Configuration of Command
Table 12 List of Command
Command
Data
C3 C2 C1 C0 _{R / W}
B7 B6 B5 B4 B3 B2 B1 B0
Reload
0 0 0 0 R / W ^*1
－
Switching access to register/E²PROM 0 0 0 1 －^*2
－
Timer enable register
Do not use (Do not access)
00 1 0
W
－ － － － TEN3 TEN2 TEN1 TEN0
00 1 1
－
－
Do not use (Do not access)
01 0 0
－
－
Control port
Setting for timer scale
Do not use (Do not access)
0 1 0 1 R / W ^*3 CTR7 CTR6 CTR5 CTR4 CTR3 CTR2 CTR1 CTR0
0 1 1 0 R / W ^*3 TS7 TS6 TS5 TS4 TS3 TS2 TS1 TS0
01 1 1
－
－
Timer setting for DO0
Timer setting for DO1
Timer setting for DO2
Timer setting for DO3
Do not use (Do not access)
1 0 0 0 R / W ^*3 8×T 7×T 6×T 5×T 4×T 3×T 2×T 1×T
1 0 0 1 R / W ^*3 8×T 7×T 6×T 5×T 4×T 3×T 2×T 1×T
1 0 1 0 R / W ^*3 8×T 7×T 6×T 5×T 4×T 3×T 2×T 1×T
1 0 1 1 R / W ^*3 8×T 7×T 6×T 5×T 4×T 3×T 2×T 1×T
11 0 0
－
－
Do not use (Do not access)
11 0 1
－
－
Do not use (Do not access)
11 1 0
－
－
Do not use (Do not access)
11 1 1
－
－
*1. R / W = 1/0 Both execute “reload”.
*2. It is register access mode when R / W = 0, E²PROM access mode when R / W = 1.
*3. By Switching access to register/E²PROM, users can select either register or E²PROM when Read/Write. Refer to “„
Register and E²PROM”.
„ Register and E²PROM
This IC has an E²PROM. Data in the E²PROM is maintained despite power-off. The S-7760A has a register which
corresponds to the data in the E²PROM, the S-7760A sends data to this corresponding register during power-on
(releasing detection of the low voltage) and inputting the reload command. In case of selecting the RESX pin by option,
the S-7760A reloads after releasing reset. The following registers are the ones to be reloaded;
・Control port register (1-byte)
・Timer scale setting register (1-byte)
・DO3 to 0 Timer setting register (1-byte in each port, total 4 bytes)
Users are able to switch access between corresponding register and E²PROM by “Switching access to register/E²PROM”
command. Immediately after power-on, the S-7760A is in “register access mode”. In this register access mode, only the
register is rewritten, the E²PROM maintains the prior data. But in “E²PROM access mode”, both data in the register and
the E²PROM is rewritten. In data Read, access mode data which is being selected by user; is read.
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Seiko Instruments Inc.