Z84C9008VSG Zilog, Z84C9008VSG Datasheet - Page 55
Z84C9008VSG
Manufacturer Part Number
Z84C9008VSG
Description
IC 8MHZ Z80 KIO 84-PLCC
Manufacturer
Zilog
Series
Z80r
Specifications of Z84C9008VSG
Processor Type
Z80
Features
Serial/Parallel Input/Output, Counter/Timer Circuit
Speed
8MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
84-LCC (J-Lead)
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Cpu Speed
8MHz
Digital Ic Case Style
LCC
No. Of Pins
84
Supply Voltage Range
5V
Operating Temperature Range
0°C To +70°C
Svhc
No SVHC (18-Jun-2010)
Rohs Compliant
Yes
Base Number
84
Clock Frequency
8MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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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
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