W78E516DPG Nuvoton Technology Corporation of America, W78E516DPG Datasheet - Page 35

• Manufacturer Part Number: W78E516DPG
• Description: IC MCU 8-BIT 64K FLASH 44-PLCC
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78E516DPG

• Core Processor: 8052
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 36
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

MOV CHPENR,#00H
Then any instruction MOVX @DPTR,A (with DPTR=1234H~1237H) will generate the positive polarity
write strobe signal at pin P4.0 . And the instruction MOV P4,#XX will output the bit3 to bit1 of data #XX
to pin P4.3~ P4.1.
ACCUMULATOR
Mnemonic: ACC
B Register
Bit
7-0
Bit:
P4xAL
P4xAH
REGISTER
Name
ACC
ADDRESS BUS
7
ACC.7
WRITE
READ
P4 REGISTER
Function
The A or ACC register is the standard 8052 accumulator.
6
ACC.6
P4.x
comparator
P4xCMP0
P4xCMP1
REGISTER
Preliminary W78E516D/ W78E058D Data Sheet
Selectable
comparator
Bit Length
;Disable CHPCON write attribute.
5
ACC.5
EQUAL
The Port 4 Structure Diagram
4
ACC.4
P4xCSINV
- 35 -
3
ACC.3
P4xFUN0
P4xFUN1
MUX 4->1
Publication Release Date: July 30, 2008
2
ACC.2
P4.x INPUT DATA BUS
DATA I/O
WR_CS
RD/WR_CS
RD_CS
1
ACC.1
Address: E0h
Revision A01
0
ACC.0
PIN
P4.x