CHAPTER 15 SERIAL INTERFACES CSI10 AND CSI11
User’s Manual U16899EJ2V0UD
328
Figure 15-2. Block Diagram of Serial Interface CSI11
(
µ
PD78F0133H, 78F0134H, 78F0136H, 78F0138H, and 78F0138HD Only)
8
8
Internal bus
Output
selector
Output latch
Transmit controller
Clock start/stop controller &
clock phase controller
SO11/P02
INTCSI11
Transmit buffer
register 11 (SOTB11)
Transmit data
controller
SI11/P03
Serial I/O shift
register 11 (SIO11)
f
X
/2
f
X
/2
2
f
X
/2
3
f
X
/2
4
f
X
/2
5
f
X
/2
6
f
X
/2
7
SCK11/P04
SSI11
Output latch
(P02)
PM02
Selector
(1) Transmit buffer register 1n (SOTB1n)
This register sets the transmit data.
Transmission/reception is started by writing data to SOTB1n when bit 7 (CSIE1n) and bit 6 (TRMD1n) of serial
operation mode register 1n (CSIM1n) is 1.
The data written to SOTB1n is converted from parallel data into serial data by serial I/O shift register 1n, and
output to the serial output pin (SO1n).
SOTB1n can be written or read by an 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
Cautions 1. Do not access SOTB1n when CSOT1n = 1 (during serial communication).
2. The SSI11 pin can be used in the slave mode. For details of the transmission/reception
operation, see 15.4.2 (2) Communication operation.
(2) Serial I/O shift register 1n (SIO1n)
This is an 8-bit register that converts data from parallel data into serial data and vice versa.
This register can be read by an 8-bit memory manipulation instruction.
Reception is started by reading data from SIO1n if bit 6 (TRMD1n) of serial operation mode register 1n (CSIM1n)
is 0.
During reception, the data is read from the serial input pin (SI1n) to SIO1n.
RESET input clears this register to 00H.
Cautions 1. Do not access SIO1n when CSOT1n = 1 (during serial communication).
2. The SSI11 pin can be used in the slave mode. For details of the reception operation, see
15.4.2 (2) Communication operation.
Remark n = 0:
µ
PD78F0132H
n = 0, 1:
µ
PD78F0133H, 78F0134H, 78F0136H, 78F0138H, 78F0138HD
Содержание MuPD78F0132H
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