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PIC17C7XX Datasheet, PDF (304/328 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM Microcontrollers with 10-bit A/D | |||
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PIC17C7XX
FIGURE F-14: 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 â0â
R = Readable bit
W = Writable bit
U = Unimplemented bit,
Reads as â0â
-n = Value at POR reset
bit 6:
CA4OVF: Capture4 Overï¬ow 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 overï¬ow). Subsequent capture events will not update the capture register with the TMR3
value until the capture register has been read (both bytes).
1 = Overï¬ow occurred on Capture4 registers
0 = No overï¬ow occurred on Capture4 registers
bit 5:
CA3OVF: Capture3 Overï¬ow 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 overï¬ow). Subsequent capture events will not update the capture register with the TMR3
value until the capture register has been read (both bytes).
1 = Overï¬ow occurred on Capture3 registers
0 = No overï¬ow 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)
DS30289A-page 304
© 1998 Microchip Technology Inc.
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