HD6413308 Hitachi Semiconductor, HD6413308 Datasheet - Page 206

• Manufacturer Part Number: HD6413308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: Hitachi Semiconductor

9.3 Operation
9.3.1 Overview
The SCI supports serial data transfer in both asynchronous and synchronous modes.
The communication format depends on settings in the SMR as indicated in Table 9-5. The clock
source and usage of the ASCK and CSCK pins depend on settings in the SMR and SCR as
indicated in Table 9-6.
Table 9-5. Communication Formats Used by SCI
C/A
0
1
Table 9-6. SCI Clock Source Selection
SMR
C/A
0
(Async
mode)
1
(Sync
mode)
* Not used by the SCI.
SMR
CHR
0
1
—
SCR
CKE1
0
1
0
1
PE
0
1
0
1
—
CKE0
0
1
0
1
0
1
0
1
STOP Mode
0
1
0
1
0
1
0
1
—
Clock
source
Internal Input/output port*
External Serial clock input
Internal Input/output port*
External Input/output port*
Asynchronous
Synchronous
ASCK pin
Serial clock output
at bit rate
at 16 bit rate
193
Format
8-Bit data
7-Bit data
8-Bit data
Parity
None
Yes
None
Yes
—
CSCK pin
Input/output port*
Input/output port*
Input/output port*
Serial clock output
Serial clock input
Stop bit
length
1
2
1
2
1
2
1
2
—