HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 176

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

5.2.19MSCI Synchronous/Address Register 1 (SA1)
Synchronous/address register 1 (SA1) specifies the SYN character pattern for transmission in byte
synchronous mono-sync or byte synchronous external-sync mode, the SYN character pattern for
transmission and reception in byte synchronous bi-sync mode, and the secondary station address in
bit synchronous mode. This register is not used in asynchronous mode.
Rev. 0, 07/98, page 160 of 453
Async
Byte sync
Bit sync HDLC
Read/Write
Initial value
Note: This register is not used in asynchronous mode.
• Byte synchronous mode
• Bit synchronous mode
Mono-sync
Bi-sync
External-sync
HDLC
mode
SA17
R/W
—
7
1
No address field checked
Single address 1
Single address 2
Dual address
SYN pattern for transmission/address field check
SA16 SA15 SA14 SA13 SA12 SA11 SA10
R/W
—
6
1
SYN pattern for transmission
SYN pattern for transmission and reception (bits 15–8)
SYN pattern for transmission
R/W
—
5
1
—
R/W
4
1
—
R/W
Not used
Not used
Bits 15–8 of the secondary station address
Bits 15–8 of the secondary station address
3
1
—
R/W
2
1
—
R/W
1
1
—
R/W
0
1