P80C557E4EFB NXP Semiconductors, P80C557E4EFB Datasheet - Page 25

• Manufacturer Part Number: P80C557E4EFB
• Manufacturer: NXP Semiconductors

Specifications of P80C557E4EFB

• Cpu Family: 80C
• Device Core: 80C51
• Device Core Size: 8b
• Frequency (max): 16MHz
• Interface Type: I2C/UART
• Program Memory Type: ROMLess
• Program Memory Size: Not Required
• Total Internal Ram Size: 1KB
• # I/os (max): 40
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
Table 15. Description of TM2CON bits
Table 16. Timer 2 prescaler select
Table 17. Timer 2 mode select
1999 Mar 02
Single-chip 8-bit microcontroller
SYMBOL
T2MS1
T2MS0
T2MS1
T2IS1
T2IS0
T2ER
T2BO
T2P1
T2P0
T2P1
0
0
1
1
0
0
1
1
TM2CON (EAH)
TM2CON.7
TM2CON.6
TM2CON.5
TM2CON.4
TM2CON.3
TM2CON.2
TM2CON.1
TM2CON.0
T2MS0
T2P0
BIT
0
1
0
1
0
1
0
1
T2IS1
Timer T2 16-bit overflow interrupt select
Timer T2 byte overflow interrupt select
Timer T2 external reset enable. When this bit is set, Timer T2 may be reset by a rising edge on RT2 (P1.5).
Timer T2 byte overflow interrupt flag
Timer T2 prescaler select
Timer T2 mode select
Clock source
Clock source/2
Clock source/4
Clock source/8
Timer T2 halted (off)
T2 clock source = f
Test mode; do not use
T2 clock source = pin T2
7
T2IS0
Figure 22. T2 control register (TM2CON).
6
CLK
/12
T2ER
5
25
T2BO
4
P83C557E4/P80C557E4/P89C557E4
MODE SELECTED
TIMER T2 CLOCK
FUNCTION
T2P1
3
T2P0
2
T2MS1
1
Product specification
T2MS0
0