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HD64F3337YCP16V Datasheet, PDF (326/749 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents | |||
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13.2.6 Serial/Timer Control Register (STCR)
Bit
7
6
5
4
IICS
IICD
IICX
IICE
Initial value
0
0
0
0
Read/Write R/W
R/W
R/W
R/W
3
STAC
0
R/W
2
MPE
0
R/W
1
ICKS1
0
R/W
0
ICKS0
0
R/W
STCR is an 8-bit readable/writable register that controls the SCI operating mode and selects the
TCNT clock source in the 8-bit timers. STCR is initialized to H'00 by a reset and in hardware
standby mode.
Bit 7âI2C Extra Buffer Select (IICS): This bit is reserved, but it can be written and read. Its
initial value is 0.
Bit 6âI2C Extra Buffer Reserve (IICD): This bit is reserved, but it can be written and read. Its
initial value is 0.
Bit 5âI2C Transfer Rate Select (IICX): This bit, in combination with bits CKS2 to CKS0 in
ICCR, selects the transfer rate in master mode. For details regarding transfer rate, refer to section
13.2.4, I2C Bus Control Register (ICCR).
Bit 4âI2C Master Enable (IICE): Controls CPU access to the data and control registers (ICCR,
ICSR, ICDR, ICMR/SAR) of the I2C bus interface.
Bit 4: IICE
0
1
Description
CPU access to I2C bus interface data and control registers is disabled
(Initial value)
CPU access to I2C bus interface data and control registers is enabled
Bit 3âSlave Input Switch (STAC): Switches host interface input pins. For details, see section
14, Host Interface.
Bit 2âMultiprocessor Enable (MPE): Enables or disables the multiprocessor communication
function on channels SCI0 and SCI1. For details, see section 12, Serial Communication Interface.
Bits 1 and 0âInternal Clock Source Select 1 and 0 (ICKS1, ICSK0): These bits select the
clock input to the timer counters (TCNT) in the 8-bit timers. For details, see section 9, 8-Bit
Timers.
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