HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 131

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

Async
Byte sync
Bit sync HDLC
Read/Write
Initial value
Notes:
NRZ or FM select
•
0:
1:
1. Reserved. These bits always read 0 and must be set to 0.
2. When these settings are selected, normal operation is not guaranteed.
Byte/Bit
synchronous
mode
NRZ
FM
NRZFM
R/W
—
7
0
*1
CODE1
R/W
—
Transmission code
type
•
•
00:
01:
10:
11:
•
00:
01:
10:
11:
6
0
*1
Byte/Bit synchronous
mode
NRZ
FM
NRZ
NRZI
Reserved
Reserved
Manchester
FM1
FM0
Reserved
CODE0
R/W
—
5
0
*1
DRATE1
R/W
*2
*2
*2
—
4
0
*1
DRATE0
ADPLL operating clock/bit rate
• Byte/Bit synchronous mode
00:
01:
10:
11:
R/W
—
3
0
*1
x 8
x 16
x 32
Reserved
—
—
2
0
Rev. 0, 07/98, page 115 of 453
*1
*2
CNCT1
R/W
Channel connection
00:
01:
10:
11:
1
0
Full duplex
communications
Auto echo
Reserved
Local loop back
CNCT0
R/W
0
0
*2