HD64570 Datasheet, PDF (131/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

7
6
5
4
3
2
1
0
Async
—^*1 —*1 —*1 —*1 —*1 —*1 CNCT1CNCT0
Byte sync NRZFMCODE1CODE0DRATE1DRATE0
Bit sync HDLC
Read/Write R/W R/W R/W R/W R/W — R/W R/W
Initial value
0
0
0
0
0
0
0
0
NRZ or FM select
• Byte/Bit
synchronous _{Transmission code}
mode
type
0: NRZ
• Byte/Bit synchronous
1: FM
mode
Channel connection
00: Full duplex
communications
01: Auto echo
10: Reserved ^*2
• NRZ
11: Local loop back
00: NRZ
01: NRZI
10: Reserved ^*2
11: Reserved ^*2
• FM
00: Manchester
01: FM1
10: FM0
11: Reserved ^*2
ADPLL operating clock/bit rate
• Byte/Bit synchronous mode
00: x 8
01: x 16
10: x 32
11: Reserved ^*2
Notes: 1. Reserved. These bits always read 0 and must be set to 0.
2. When these settings are selected, normal operation is not guaranteed.
Rev. 0, 07/98, page 115 of 453