Hitachi H8/3035 Series Hardware Manual page 328

Synchronous Mode
• The communication format has a fixed 8-bit data length.
• In receiving, it is possible to detect overrun errors.
• An internal or external clock can be selected as the SCI clock source.
 When an internal clock is selected, the SCI operates using the on-chip baud rate
generator, and outputs a serial clock signal to external devices.
 When an external clock is selected, the SCI operates on the input serial clock. The on-
chip baud rate generator is not used.
Table 11-8 SMR Settings and Serial Communication Formats
SMR Settings
Bit 7 Bit 6 Bit 2 Bit 5
$ $
C/ CHR MP PE
0 0 0 0
0 0 0 0
0 0 0 1
0 0 0 1
0 1 0 0
0 1 0 0
0 1 0 1
0 1 0 1
0 0 1 —
0 0 1 —
0 1 1 —
0 1 1 —
1 — — —
314
Bit 3
STOP Mode
0 Asynchronous
mode
1
0
1
0
1
0
1
0 Asynchronous
mode (multi-
processor
format)
1
0
1
— Synchronous
mode
SCI Communication Format
Multi-
Data processor
Length Bit
8-bit data Absent
7-bit data
8-bit data Present
7-bit data
8-bit data Absent
Parity Stop Bit
Bit Length
Absent 1 bit
2 bits
Present 1 bit
2 bits
Absent 1 bit
2 bits
Present 1 bit
2 bits
Absent 1 bit
2 bits
1 bit
2 bits
None