W77E058A40DL Nuvoton Technology Corporation of America, W77E058A40DL Datasheet - Page 64

• Manufacturer Part Number: W77E058A40DL
• Description: IC MCU 8-BIT 32K FLASH 40-DIP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W77r

Specifications of W77E058A40DL

• 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: 32
• 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: 40-DIP
• 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: Through Hole
• Pin Count: 40
• Package Type: PDIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

15.4 Mode 3
This mode is similar to Mode 2 in all respects, except that the baud rate is programmable. The user
must first initialize the Serial related SFR SCON before any communication can take place. This
involves selection of the Mode and baud rate. The Timer 1 should also be initialized if modes 1 and 3
are used. In all four modes, transmission is started by any instruction that uses SBUF as a destination
register. Reception is initiated in Mode 0 by the condition RI = 0 and REN = 1. This will generate a
clock on the TxD pin and shift in 8 bits on the RxD pin. Reception is initiated in the other modes by the
incoming start bit if REN = 1. The external device will start the communication by transmitting the start
bit.
Table 10. Serial Ports Modes
SM1
(SMOD_1)
0
0
1
1
SMOD=
Overflow
RCLK
TCLK
Timer 1
RXD
SM0
2
0
0
1
0
1
SAMPLE
0
0
1
Mode
(for Serial Port 0 only)
1
1
DETECTOR
0
1
2
3
Timer 2 Overflow
1-TO-0
16
16
Asynch.
Asynch.
Asynch.
Synch.
Type
Write to
SBUF
START
RX CLOCK
TX CLOCK
TX START
CONTROLLER
DETECTOR
RX
SERIAL
Figure 23. Serial Port Mode 3
4 or 12 T
Timer 1 or 2
32 or 64
Timer 1 or 2
BIT
Baud Clock
Data Bus
RX SHIFT
TX SHIFT
Internal
LOAD
SBUF
T
CLKS
- 64 -
CLKS
TI
RI
TB8
Receive Shift Register
CLOCK
SIN
10 bits
11 bits
11 bits
Frame
8 bits
PAROUT
Size
Transmit Shift Register
STOP
LOAD
CLOCK
START
PARIN
D8
D8
SOUT
SBUF
Start
RB8
No
Bit
1
1
1
Serial Port
Stop
SBUF
Interrupt
Read
No
Bit
1
1
TXD
1
W77E58
Function
9th bit
Internal
None
None
0, 1
0, 1
Data
Bus