HD6433308 HITACHI [Hitachi Semiconductor], HD6433308 Datasheet - Page 206

• Manufacturer Part Number: HD6433308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: HITACHI [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
—