Z84C2008PEG Zilog, Z84C2008PEG Datasheet - Page 56

• Manufacturer Part Number: Z84C2008PEG
• Description: IC 8MHZ Z80 CMOS PIO 40-DIP
• Manufacturer: Zilog
• Series: Z80r

Specifications of Z84C2008PEG

• Processor Type: Z80
• Features: Low Power CMOS
• Speed: 8MHz
• Voltage: 5V
• Mounting Type: Through Hole
• Package / Case: 40-DIP (0.620", 15.75mm)
• Cpu Speed: 8MHz
• Digital Ic Case Style: DIP
• No. Of Pins: 40
• Supply Voltage Range: 5V
• Operating Temperature Range: -40°C To +100°C
• Svhc: No SVHC (18-Jun-2010)
• Rohs Compliant: Yes
• Processor Series: Z84C2xx
• Core: Z80
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 16
• Operating Supply Voltage: 0 V to 5 V
• Maximum Operating Temperature: + 100 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Base Number: 84
• Clock Frequency: 8MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

36
UM008005-0205
Z80 CPU
User’s Manual
Eleven bytes are required for this operation.
Figure 22. Shifting of BCD Digits/Bytes
Example Four:
One number is to be subtracted from another number, both of which are in
packed BCD format and are of equal but varying length. The result is stored
in the location of the minuend. The operation is programmed as follows:
SUBDEC:LD
LD
LD
LD
AND
SBC
HL, ARG1
DE, ARG2
B, LENGTH ;LENGTH OF TWO ARGUMENTS
A
A, (DE)
A, (HL)
Hardware and Software Implementation Examples
;B IS NOT ZERO, OTHERWISE FALL
;THROUGH.
;ADDRESS OF MINUEND
;ADDRESS OF SUBTRAHEND
;CLEAR CARRY FLAG
;SUBTRAHEND TO ACC
;SUBTRACT (HL) FROM ACC
0