HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 128

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

Rev. 0, 07/98, page 112 of 453
Async
Byte sync
Bit sync HDLC
Read/Write
Initial value
Address field check
• Bit synchronous mode
00:
01:
10:
11:
Bit rate
• Asynchronous mode
00:
01:
10:
11:
Note:
1/1 clock rate
1/16 clock rate
1/32 clock rate
1/64 clock rate
Address field no-check
Single address 1
Single address 2
Dual address
Reserved. These bits always read 0 and must be set to 0.
ADDRS1 A DDRS0
BRATE1
R/W
—
7
0
*
BRATE0
R/W
*2
—
6
0
*
Transmit character
length
• Asynchronous mode
00:
01:
10:
11:
TXCHR1
R/W
—
5
0
8 bits/character
7 bits/character
6 bits/character
5 bits/character
*
Receive character
length
• Asynchronous mode
00:
01:
10:
11:
TXCHR0
R/W
—
4
0
8 bits/character
7 bits/character
6 bits/character
5 bits/character
*
RXCHR1
R/W
—
3
0
*
RXCHR0
R/W
—
2
0
*
PMPM1
R/W
Parity/multiprocessor
mode
• Asynchronous mode
00:
01:
10:
11:
—
1
0
*
No parity/MP bit
MP bit appended (by command)
Even parity appended and checked
Odd parity appended and checked
PMPM0
R/W
—
0
0
*