HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 380

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

Transmit/Receive Formats: Table 13.10 shows the 12 communication formats that can be
selected in the asynchronous mode. The format is selected by settings in the serial mode register
(SMR).
Table 13.10
CHR PE
0
0
0
0
1
1
1
1
0
0
1
1
—: Don't care bits.
Note: START: Start bit
Clock: An internal clock generated by the on-chip baud rate generator or an external clock input
from the SCK pin can be selected as the SCI transmit/receive clock. The clock source is selected
by the C/A bit in the serial mode register (SMR) and bits CKE1 and CKE0 in the serial control
register (SCR) (table 13.9).
When an external clock is input at the SCK pin, it must have a frequency equal to 16 times the
0
0
1
1
0
0
1
1
—
—
—
—
STOP: Stop bit
P: Parity bit
MPB: Multiprocessor bit
SMR Bits
MP
0
0
0
0
0
0
0
0
1
1
1
1
Serial Communication Formats (asynchronous mode)
STOP
0
1
0
1
0
1
0
1
0
1
0
1
START
START
START
START
START
START
START
START
START
START
START
START
1
2
3
4
7-Bit data
7-Bit data
7-Bit data
7-Bit data
7-Bit data
7-Bit data
8-Bit data
8-Bit data
8-Bit data
8-Bit data
8-Bit data
8-Bit data
5
6
7
8
STOP
STOP STOP
MPB
MPB
P
P
9
STOP
STOP STOP
STOP
STOP STOP
STOP
STOP STOP
MPB
MPB
10
P
P
STOP
STOP STOP
STOP
STOP STOP
11
HITACHI 367
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