Datasheet

© 2009-2012 Microchip Technology Inc. Preliminary DS70616F-page 281
dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
14.2 Input Capture Registers
REGISTER 14-1: ICxCON1: INPUT CAPTURE x CONTROL REGISTER 1
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
— — ICSIDL ICTSEL<2:0> — —
bit 15 bit 8
U-0 R/W-0 R/W-0 R/HC/HS-0 R/HC/HS-0 R/W-0 R/W-0 R/W-0
— ICI<1:0> ICOV ICBNE ICM<2:0>
bit 7 bit 0
Legend:
R = Readable bit HC = Cleared by Hardware HS = Set by Hardware ‘0’ = Bit is cleared
-n = Value at POR W = Writable bit U = Unimplemented bit, read as ‘0’
bit 15-14 Unimplemented: Read as ‘0’
bit 13 ICSIDL: Input Capture Stop in Idle Control bit
1 = Input capture will Halt in CPU Idle mode
0 = Input capture will continue to operate in CPU Idle mode
bit 12-10 ICTSEL<12:10>: Input Capture Timer Select bits
111 = Peripheral clock (F
P) is the clock source of the ICx
110 = Reserved
101 = Reserved
100 = Clock source of T1CLK is the clock source of the ICx (only the synchronous clock is supported)
011 = Clock source of T5CLK is the clock source of the ICx
010 = Clock source of T4CLK is the clock source of the ICx
001 = Clock source of T2CLK is the clock source of the ICx
000 = Clock source of T3CLK is the clock source of the ICx
bit 9-7 Unimplemented: Read as ‘0’
bit 6-5 ICI<1:0>: Number of Captures per Interrupt Select bits
(this field is not used if ICM<2:0> = 001 or 111)
11 = Interrupt on every fourth capture event
10 = Interrupt on every third capture event
01 = Interrupt on every second capture event
00 = Interrupt on every capture event
bit 4 ICOV: Input Capture Overflow Status Flag bit (read-only)
1 = Input capture buffer overflow occurred
0 = No input capture buffer overflow occurred
bit 3 ICBNE: Input Capture Buffer Not Empty Status bit (read-only)
1 = Input capture buffer is not empty, at least one more capture value can be read
0 = Input capture buffer is empty
bit 2-0 ICM<2:0>: Input Capture Mode Select bits
111 = Input capture functions as interrupt pin only in CPU Sleep and Idle mode (rising edge detect
only, all other control bits are not applicable)
110 = Unused (module disabled)
101 = Capture mode, every 16th rising edge (Prescaler Capture mode)
100 = Capture mode, every 4th rising edge (Prescaler Capture mode)
011 = Capture mode, every rising edge (Simple Capture mode)
010 = Capture mode, every falling edge (Simple Capture mode)
001 = Capture mode, every edge, rising and falling (Edge Detect mode (ICI<1:0>) is not used in this
mode)
000 = Input Capture module is turned off