COP888GW Datasheet, PDF (37/44 Pages) National Semiconductor (TI) – 8-Bit Microcontroller with Pulse Train Generators

Instruction Execution Time
Most instructions are single byte (with immediate addressing mode instructions taking two bytes)
Most single byte instructions take one cycle time to execute
Skipped instructions require x number of cycles to be skipped where x equals the number of bytes in the skipped instruction
opcode
See the BYTES and CYCLES per INSTRUCTION table for details
Bytes and Cycles per InstructIon
The following table shows the number of bytes and cycles for each instruction in the format of byte cycle
Arithmetic and Logic Instructions
Instructions Using A C
Transfer of Control Instructions
B Direct Immed
ADD 1 1 3 4
22
ADC 1 1 3 4
22
SUBC 1 1 3 4
22
AND 1 1 3 4
22
OR
11 34
22
XOR 1 1 3 4
22
IFEQ 1 1 3 4
22
IFGT 1 1 3 4
22
IFBNE 1 1
DRSZ
13
SBIT 1 1 3 4
RBIT 1 1 3 4
lFBIT 1 1 3 4
CLRA
11
INCA
11
DECA
11
LAID
13
DCORA
11
RRCA
11
RLCA
11
SWAPA
11
SC
11
RC
11
IFC
11
IFNC
11
PUSHA
13
POPA
13
ANDSZ
22
JMPL
34
JMP
23
JP
13
JSRL
35
JSR
25
JID
13
VIS
15
RET
15
RETSK
15
RETI
15
INTR
17
NOP
11
RPND 1 1
Memory Transfer Instructions
Register
Indirect
Direct
B
X
XA
11
13
23
LD A
11
13
23
LD B Imm
LD B Imm
LD Mem Imm
22
33
LD Reg Imm
23
IFEQ MD Imm
33
Note e l Memory location addressed by B or X or directly
Immed
22
11
22
Register Indirect
Auto Incr and Decr
Ba Bb
Xa Xb
12
13
12
13
22
(IF B ^k 16)
(IF B ^l 15)
Mask Options
The mask programmable options are shown below The op-
tions are programmed at the same time as the ROM pattern
submission
OPTION 1 CLOCK CONFIGURATION
e 1 Crystal Oscillator (CKI 10)
G7 (CKO) is clock generator output to crys-
tal resonator with CKI being the clock input
OPTION 2 HALT
e 1 Enable HALT mode
e 2 Disable HALT mode
OPTION 3 BONDING OPTIONS
e 1 68 Pins PLCC
The chip can be driven by a clock input on the CKI input pin
which can be between DC and 10 MHz The CKO output
clock is on pin G7 (if clock option e 1 has been selected)
The CKI input frequency is divided down by 10 to produce
the instruction cycle clock (1 t_c)
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