W77E058A40PL Nuvoton Technology Corporation of America, W77E058A40PL Datasheet - Page 29

• Manufacturer Part Number: W77E058A40PL
• Description: IC MCU 8-BIT 32K FLASH 44-PLCC
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W77r

Specifications of W77E058A40PL

• Program Memory Type: FLASH
• Program Memory Size: 32KB (32K x 8)
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, Serial Port
• Peripherals: POR, WDT
• Number Of I /o: 36
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Cpu Family: W77
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 40MHz
• Interface Type: UART
• Total Internal Ram Size: 1KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Instruction Set Architecture: CISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

8. INSTRUCTION
The W77E058 executes all the instructions of the standard 8032 family. The operation of these
instructions, their effect on the flag bits and the status bits is exactly the same. However, timing of
these instructions is different. The reason for this is two fold. Firstly, in the W77E058, each machine
cycle consists of 4 clock periods, while in the standard 8032 it consists of 12 clock periods. Also, in the
W77E058 there is only one fetch per machine cycle i.e. 4 clocks per fetch, while in the standard 8032
there can be two fetches per machine cycle, which works out to 6 clocks per fetch.
The advantage the W77E058 has is that since there is only one fetch per machine cycle, the number
of machine cycles in most cases is equal to the number of operands that the instruction has. In case of
jumps and calls there will be an additional cycle that will be needed to calculate the new address. But
overall the W77E058 reduces the number of dummy fetches and wasted cycles, thereby improving
efficiency as compared to the standard 8032.
Table 2. Instructions that affect Flag settings
A "X" indicates that the modification is as per the result of instruction.
Table 3. Instruction Timing for W77E058
INSTRUCTION
ADD
ADDC
SUBB
MUL
DIV
DA A
RRC A
RLC A
SETB C
NOP
ADD A, R0
ADD A, R1
ADD A, R2
ADD A, R3
ADD A, R4
ADD A, R5
ADD A, R6
ADD A, R7
ADD A, @R0
ADD A, @R1
ADD A, direct
ADD A, #data
INSTRUCTION
CARRY
X
X
X
X
X
X
0
0
1
OP-CODE
HEX
2C
2D
00
28
29
2A
2B
2E
2F
26
27
25
24
OVERFLOW
X
X
X
X
X
BYTES
1
1
1
1
1
1
1
1
1
1
1
2
2
AUXILIARY
CARRY
X
X
X
MACHINE
W77E058
CYCLES
- 29 -
1
1
1
1
1
1
1
1
1
1
1
2
2
INSTRUCTION
MOV C, bit
ORL C, bit
ORL C, bit
ANL C, bit
ANL C, bit
CLR C
CPL C
CJNE
W77E058
CYCLES
CLOCK
4
4
4
4
4
4
4
4
4
4
4
8
8
Publication Release Date: April 17, 2007
CARRY
X
X
X
X
X
X
X
0
CYCLES
CLOCK
8032
OVERFLOW
12
12
12
12
12
12
12
12
12
12
12
12
12
W77E058A
W77E058 VS.
8032 SPEED
AUXILIARY
Revision A10
RATIO
CARRY
1.5
1.5
3
3
3
3
3
3
3
3
3
3
3