W77E058A40DL Nuvoton Technology Corporation of America, W77E058A40DL Datasheet - Page 57

• 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

12.3.2 Auto-Reload Mode, Counting up
The auto-reload mode as an up counter is enabled by clearing the CP RL
and clearing the DCEN bit in T2MOD register. In this mode, Timer/Counter 2 is a 16 bit up counter.
When the counter rolls over from FFFFh, a reload is generated that causes the contents of the
RCAP2L and RCAP2H registers to be reloaded into the TL2 and TH2 registers. The reload action also
sets the TF2 bit. If the EXEN2 bit is set, then a negative transition of T2EX pin will also cause a
reload. This action also sets the EXF2 bit in T2CON.
div. by 4
div. by 64
div. by 1024 osc/256
EXEN2 = T2CON.3
Mode
TR2 = T2CON.2
div. by 4
div. by 64
div. by 1024 osc/256
Clock Source
T2EX = P1.1
Mode
EXEN2 = T2CON.3
Clock Source
TR2 = T2CON.2
T2 = P1.0
T2EX = P1.1
T2 = P1.0
osc/1
osc/16
input
osc/1
osc/16
input
1/12
1/4
1/12
1/4
T2M = CKCON.5
1
0
T2M = CKCON.5
Figure 15. 16-Bit Auto-reload Mode, Counting Up
1
0
C/T2 = T2CON.1
1
0
C/T2 = T2CON.1
Figure 14. 16-Bit Capture Mode
0
1
- 57 -
RCAP2L
RCAP2L
TL2
TL2
RCAP2H
RCAP2H
TH2
Publication Release Date: April 17, 2007
TH2
/
T2CON.7
T2CON.6
T2CON.7
2 bit in the T2CON register
T2CON.6
EXF2
TF2
EXF2
TF2
W77E058A
Interrupt
Timer 2
Revision A10
Interrupt
Timer 2