Z84C2008PEG Zilog, Z84C2008PEG Datasheet - Page 55

• 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

UM008005-0205
Example Two:
A string in memory (limited to a maximum length of 132 characters)
starting at location DATA is to be moved to another memory location
starting at location BUFFER until an ASCII $ (used as a string delimitor) is
found. This operation is performed as follows:
LOOP:CP
END:
Nineteen bytes are required for this operation.
Example Three:
A 16-digit decimal number is shifted as depicted in the Figure 22. This shift
is performed to mechanize BCD multiplication or division. The 16-digit
decimal number is represented in packed BCD format (two BCD digits/
byte) The operation is programmed as follows:
ROTAT:RLD
LD
LD
LD
LD
JR
LDI
JP
LD
LD
XOR A
INC HL
DJNZ ROTAT-$ ;DECREMENT B AND GO TO ROTAT IF
HL, DATA ;STARTING ADDRESS OF DATA STRING
DE, BUFFER;STARTING ADDRESS OF TARGET BUFFER
BC, 132
A, '$'
(HL)
Z, END-$ ;GO TO END IF CHARACTERS EQUAL
PE, LOOP ;GO TO "LOOP" IF MORE CHARACTERS
HL, DATA;ADDRESS OF FIRST BYTE
B, COUNT;SHIFT COUNT
Hardware and Software Implementation Examples
;CLEAR ACCUMULATOR
;ROTATE LEFT LOW ORDER DIGIT IN ACC
;WITH DIGITS IN (HL)
;ADVANCE MEMORY POINTER.
;MAXIMUM STRING LENGTH
;STRING DELIMITER CODE
;COMPARE MEMORY CONTENTS WITH
;OTHERWISE, FALL THROUGH
;DELIMITER
;MOVE CHARACTER (HL) to (DE)
;INCREMENT HL AND DE, DECREMENT BC
;NOTE: P/V FLAG IS USED
;TO INDICATE THAT REGISTER BC WAS
;DECREMENTED TO ZERO.
User’s Manual
Z80 CPU
35