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VMX51C1020
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VMX51C1020 Block Diagram
FIGURE 4: VMX51C1020 BLOCK DIAGRAM
8051
µPROCESSOR
SINGLE CYCLE
In-Circuit
Debugging
through UART0
2 UARTs
Serial Ports
56KB
Program FLASH
(In-Circuit Programmable )
1280 Bytes RAM
(256x8 & 1kX8)
·
2 Interrupt inputs
·
28 I/Os,
·
Interrupt on
Port1 change
·
3 Timers,
·
2 Baud. rate
generators
·
4 CCU units
[MULT / ACCU]
Unit with
BARREL
SHIFTER
SPI Interface
I²C Bus
Interface
Power On Reset
Circuit
+
WatchDog Timer
Clock Control Unit
J1708/
RS485/RS422
Compatible
Transceiver
XTAL
4 PWM D/As
4 PWM D/As
4 PWM D/As
4 PWM Outputs
8 / 16 bit Resolution
(Can be used as D/As)
2 DIGITAL
POTENTIOMETERS
1 DIGITALLY
CONTROLLED
SWITCH
Operational
Amplifier
Programmable
Current Source
12-BIT A/D
CONVERTER
ISRCIN, ISRCOUT, OPOUT are
internally connected to A/D Input
Multiplexer
Band gap
Reference
PGA
XTVREF Input
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