HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 596

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

In asynchronous mode, the SCIF performs synchronization at the falling edge of the start bit in
reception. The SCIF samples the data on the eighth (fourth, second) pulse of a clock with a
frequency of 16 (8, 4) times the length of one bit, so that the transfer data is latched at the center of
each bit.
Transmit/Receive Format: Table 14.10 shows the transmit/receive formats that can be used in
asynchronous mode. Any of 12 transmit/receive formats can be selected by means of settings in
the serial mode register (SCSMR).
Serial
data
1
Start
1 bit
bit
0
(Example with 8-Bit Data, Parity, Two Stop Bits, LSB-First Transfer)
(LSB)
Figure 14.3 Data Format in Asynchronous Communication
D0
D1
One unit of transfer data (character or frame)
D2
Transmit/receive data
7 or 8 bits
D3
D4
D5
D6
(MSB)
D7
or none
Parity
1 bit,
0/1
bit
Idle state (mark state)
1
bit(s)
2 bits
Stop
1 or
1
1
583