P87C554 查看數據表（PDF） - Philips Electronics

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P87C554

80C51 8-bit microcontroller 16K/512 OTP/RAM 8 channel 10-bit A/D, I2C, PWM, capture/compare, high I/O

Philips Electronics 

Philips Semiconductors

80C51 8-bit microcontroller

16K/512 OTP/RAM, 8 channel 10-bit A/D, I2C, PWM,

capture/compare, high I/O

Product data

P87C554

IEN1 (E8H)

7

ET2

(MSB)

6

ECM2

5

ECM1

4

ECM0

3

ECT3

2

ECT2

1

ECT1

0

ECT0

(LSB)

BIT

IEN1.7

IEN1.6

IEN1.5

IEN1.4

IEN1.3

IEN1.2

IEN1.1

IEN1.0

SYMBOL

ET2

ECM2

ECM1

ECM0

ECT3

ECT2

ECT1

ECT0

FUNCTION

Enable Timer T2 overflow interrupt(s)

Enable T2 Comparator 2 interrupt

Enable T2 Comparator 1 interrupt

Enable T2 Comparator 0 interrupt

Enable T2 Capture register 3 interrupt

Enable T2 Capture register 2 interrupt

Enable T2 Capture register 1 interrupt

Enable T2 Capture register 0 interrupt

Figure 11. Timer T2 Interrupt Enable Register (IEN1)

Reset Value = 00H

SU01083

TM2CON (EAH)

7

T2IS1

(MSB)

6

T2IS0

5

T2ER

4

T2BO

3

T2P1

2

T2P0

1

0

T2MS1 T2MS0

(LSB)

Reset Value = 00H

BIT

TM2CON.7

TM2CON.6

TM2CON.5

SYMBOL

TSIS1

T2IS0

T2ER

TM2CON.4

TM2CON.3

TM2CON.2

T2BO

T2P1

T2P0

FUNCTION

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

T2P1

0

0

1

1

T2P0

0

1

0

1

Timer T2 Clock

Clock source

Clock source/2

Clock source/4

Clock source/8

TM2CON.1

TM2CON.0

T2MS1

T2MS0

Timer T2 mode select

T2MS1 T2MS0

0

0

0

1

1

0

1

1

Mode Selected

Timer T2 halted (off)

T2 clock source = fOSC/12

Test mode; do not use

T2 clock source = pin T2

Figure 12. T2 Control Register (TM2CON)

SU01084

2002 Mar 25

16

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