W77E058A40DL Nuvoton Technology Corporation of America, W77E058A40DL Datasheet - Page 55

• 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

12.2.4 Mode 3
Mode 3 has different operating methods for the two timer/counters. For timer/counter 1, mode 3 simply
freezes the counter. Timer/Counter 0, however, configures TL0 and TH0 as two separate 8 bit count
registers in this mode. The logic for this mode is shown in the figure. TL0 uses the Timer/Counter 0
control bits C T
clock/4) or 1-to-0 transitions on pin T0 as determined by C/T (TMOD.2). TH0 is forced as a clock cycle
counter (clock/12 or clock/4) and takes over the use of TR1 and TF1 from Timer/Counter 1. Mode 3 is
used in cases where an extra 8 bit timer is needed. With Timer 0 in Mode 3, Timer 1 can still be used
in Modes 0, 1 and 2., but its flexibility is somewhat limited. While its basic functionality is maintained, it
no longer has control over its overflow flag TF1 and the enable bit TR1. Timer 1 can still be used as a
timer/counter and retains the use of GATE and INT1 pin. In this condition it can be turned on and off
by switching it out of and into its own Mode 3. It can also be used as a baud rate generator for the
serial port.
div. by 4
div. by 64
div. by 1024 osc/256
Mode
Clock Source
(GATE = TMOD.7)
GATE = TMOD.3
(TR1 = TCON.6)
TR0 = TCON.4
(INT1 = P3.3)
INT0 = P3.2
(T1 = P3.5)
T0 = P3.4
osc/1
osc/16
input
/
, GATE, TR0, INT0 and TF0. The TL0 can be used to count clock cycles (clock/12 or
1/12
(T1M = CKCON.4)
1/4
T0M = CKCON.3
1
0
0
1
(C/T = TMOD.6)
C/T = TMOD.2
Figure 12. Timer/Counter Mode 2.
- 55 -
0
Timer 1 functions are shown in brackets
0
(TH1)
(TL1)
TH0
TL0
Publication Release Date: April 17, 2007
7
7
W77E058A
TFx
(TF1)
TF0
Revision A10
Interrupt