McCain 2070LX - 2070-2 E+ Block Diagram

40
3.3 2070-2E+ BLOCK DIAGRAM
A3 Connector
DIN 96
POWER UP
CPURESET
LINESYNC
POWERDN
SP3
TxD+
TxD-
TxCLKO+
TxCLKO-
RxD+
RxD-
RxCLK+
RxCLK-
SP5
TxD+
TxD-
TxCLK+
TxCLK-
RxD+
RxD-
RxCLK+
RxCLK-
RS 485
Receiver/Driver
Isolation
Stage
RS 485
Receiver/Driver
C12S
DB25
LINESYNC+
LINESYNC-
NRESET+
NRESET-
POWERDN+
POWERDN-
SP3
TxD+
TxD-
TxCLKO+
TxCLKO-
RxD+
RxD-
RxCLK+
RxCLK-
SP5
TxD+
TxD-
TxCLK+
TxCLK-
RxD+
RxD-
RxCLK+
RxCLK-
C11S
CPC Conn
37 Pos
C1S
Conn 104 Pos.
MC68LC302
SP5
TxD
TxCLK
RxD
RxCLK
Control Bus
Address Bus
Data Bus
LINESYNC
NRESET
FLASH
SP5
LED
BDM
Switch
Enable/Disable
SP3
Isolation
Stage
Isolation
Stage / OR
RS 485
Driver
SP3 LED’S
TxD
RxD
SP5 LED’S
TxD
RxD
SP3
Active LED
Connector
150 pos
5 rows
Microprocessor
Reset Circuit
1
1
WatchDog
Driver
Enable WatchDog
Jumper
Inputs
Drivers
Outputs
Drivers
Data Bus
Address Bus
Control Bus
SRAM