PIC17LC756-25IPQTP 查看數據表（PDF） - Microchip Technology

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PIC17LC756-25IPQTP

High-Performance 8-Bit CMOS EPROM Microcontrollers

Microchip Technology 

PIC17C75X

FIGURE 13-3: TCON3 REGISTER (ADDRESS: 16h, BANK 7)

U-0

-

bit7

bit 7:

R - 0 R - 0 R/W - 0 R/W - 0 R/W - 0 R/W - 0 R/W - 0

CA4OVF CA3OVF CA4ED1 CA4ED0 CA3ED1 CA3ED0 PWM3ON

bit0

Unimplemented: Read as ‘0’

R = Readable bit

W = Writable bit

U = Unimplemented bit,

Reads as ‘0’

-n = Value at POR reset

bit 6:

CA4OVF: Capture4 Overflow Status bit

This bit indicates that the capture value had not been read from the capture register pair (CA4H:CA4L)

before the next capture event occurred. The capture register retains the oldest unread capture value (last

capture before overflow). Subsequent capture events will not update the capture register with the TMR3

value until the capture register has been read (both bytes).

1 = Overflow occurred on Capture4 registers

0 = No overflow occurred on Capture4 registers

bit 5:

CA3OVF: Capture3 Overflow Status bit

This bit indicates that the capture value had not been read from the capture register pair (CA3H:CA3L)

before the next capture event occurred. The capture register retains the oldest unread capture value (last

capture before overflow). Subsequent capture events will not update the capture register with the TMR3

value until the capture register has been read (both bytes).

1 = Overflow occurred on Capture3 registers

0 = No overflow occurred on Capture3 registers

bit 4-3:

CA4ED1:CA4ED0: Capture4 Mode Select bits

00 = Capture on every falling edge

01 = Capture on every rising edge

10 = Capture on every 4th rising edge

11 = Capture on every 16th rising edge

bit 2-1:

CA3ED1:CA3ED0: Capture3 Mode Select bits

00 = Capture on every falling edge

01 = Capture on every rising edge

10 = Capture on every 4th rising edge

11 = Capture on every 16th rising edge

bit 0:

PWM3ON: PWM3 On bit

1 = PWM3 is enabled (The RG5/PWM3 pin ignores the state of the DDRG<5> bit)

0 = PWM3 is disabled (The RG5/PWM3 pin uses the state of the DDRG<5> bit for data direction)

© 1997 Microchip Technology Inc.

Preliminary

DS30264A-page 93

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