HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 210

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

Rev. 0, 07/98, page 194 of 453
SYN character
mismatch
Notes:
Initialization by reset
Figure 5.25 State Transition Diagram for Byte Synchronous Mode Reception
"RX enable" issued
1. SYNC line input wait state for external synchronous mode.
2. SYNC line input not detected for external synchronous mode.
3. Command names are enclosed in double quotation marks ("").
*2
First SYN character
match (bi-sync)
disable state
SYN1 wait
state
RX
"RX disable", "RX reset", or "channel reset" issued in any state
*1
SYNC line input
(external synchronous)
SYN character match (mono-sync)
Second SYN character
mismatch (bi-sync)
"Message reject" issued
SYN2 wait
state
Second SYN character
match (bi-sync)
receive state
Character