tmp88cs34ng TOSHIBA Semiconductor CORPORATION, tmp88cs34ng Datasheet - Page 87

• Manufacturer Part Number: tmp88cs34ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Serial Clock Source Control Register
Serial Clock Control Status Register
SCCRB
(
SCSR
(
00FF1H
00FF1H
2.9.2
2.9.3
)
)
Note:
SCEN
SCRQ
Control
operation status.
mode control” and “2.9.9 Clocked-synchronous 8-bit SIO mode control”.
Serial Clock Source Control
generater.
SCRQ
SCEN
Source clock
7
7
The following registers are used for control the serial bus interface and monitor the
The above registers differ depending on a mode to be used. Refer to Section “2.9.7 I
A serial bus interface circuit can reduce the power consumption by stopping a serial clock
SCRQ
SCEN
•
•
•
•
•
•
•
•
When SCRQ and SCEN are “1”, SCEN cannot be cleared to “0”. When SCRQ is “0”, SCEN is cleared to “0”.
Serial bus interface control register A (SBICRA)
Serial bus interface control register B (SBICRB)
Serial bus interface data buffer register (SBIDBR)
I
Serial bus interface status register A (SBISRA)
Serial bus interface status register B (SBISRB)
Serial clock source control register (SCCRB)
Serial clock control status register (SCSR)
2
6
6
C bus address register (I2CAR)
Serial clock source control
Serial clock source request
5
5
“1” → SCEN Write data except
Figure 2.9.2 Serial Clock Source
4
4
3
3
88CS34-87
“00” to SBIM
2
2
0: Do not generate source clock
1: Generate source clock
0: No source clock request from serial bus interface
1: Source clock request from serial bus interface
Clock generation
1
1
Write data
“00” to SBIM
0
0
(Initial value: 0*** ****)
(Initial value: 0*** ****)
“0” → SCEN
TMP88CS34/CP34
2007-09-12
Write
Read
only
only
2
C bus