W742E816 Просмотр технического описания (PDF) - Winbond

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W742E816

4-BIT MICROCONTROLLER

Winbond 

W742E/C816

Deleted: SA5505

Deleted: W742C811

Pin Description, continued

SYMBOL

I/O

COM0 − COM15

O

SEG32 − SEG39

O

(K00 − K03, K10 − K13)

CP, CN

I

VLCD1

I

VDD

I

VSS

I

FUNCTION

LCD common signal output pins.

The LCD alternating frequency can be selected by code option.

LCD segment output pins or DC N-MOS open drain output pins

selected by code option.

Connection terminals for LCD voltage doubler capacitor (0.1 µF),

tuning the capacitor value can reduce the LCD driving current.

LCD supply voltage input or connect capacitor (0.1µF) to ground

when enable internal pump LCD voltage

Positive power supply (+).

Negative power supply (-).

5. FUNCTIONAL DESCRIPTION

5.1 Program Counter (PC)

Organized as an 15-bit binary counter (PC0 to PC14), the program counter generates the addresses

of the 32768(32K) × 16 on-chip ROM containing the program instruction words. When the interrupt or

initial reset conditions are to be executed, the corresponding address will be loaded into the program

counter directly. From address 0000h to 0023h are reserved for reset and interrupt service routine.

The format used is shown below.

Table 1 Vector address and interrupt priority

ITEM

Initial Reset

INT 0 (Divider0)

INT 1 (Timer 0)

INT 2 (Port RC)

INT 3 (Port 1.2 ( INT0 ))

INT 4 (Divider1)

INT 5 (Serial I/O or FSK baud rate)

INT 6 (Port1.3 ( INT1 ))

INT 7 (Timer 1)

Code Start

ADDRESS

0000H

0004H

0008H

000CH

0010H

0014H

0018H

001CH

0020H

0024H

INTERRUPT PRIORITY

-

1st

2nd

3rd

4th

5th

6th

7th

8th

-

Publication Release Date: April 15, 2005

-7-

Revision A2

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