PIC18F25J11-I/PT MICROCHIP [Microchip Technology], PIC18F25J11-I/PT Datasheet - Page 279
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PIC18F25J11-I/PT
Manufacturer Part Number
PIC18F25J11-I/PT
Description
28/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F25J11-IPT.pdf
(528 pages)
- Current page: 279 of 528
- Download datasheet (9Mb)
18.4.4.2
The DMACON2 register contains control bits for
controlling interrupt generation and inter-byte delay
behavior. The INTLVL<3:0> bits are used to select when
an SSP2IF interrupt should be generated.The function
of the DLYCYC<3:0> bits depends on the SPI operating
mode (Master/Slave), as well as the DLYINTEN setting.
In SPI Master mode, the DLYCYC<3:0> bits can be used
REGISTER 18-4:
© 2009 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-4
DLYCYC3
R/W-0
DMACON2
DLYCYC<3:0>: Delay Cycle Selection bits
When DLYINTEN = 0, these bits specify the additional delay (above the base overhead of the
hardware) in number of T
When DLYINTEN = 1, these bits specify the additional delay in number of T
completed transfer before an interrupt to the CPU is invoked. In this case, the delay before the
SSP2BUF register is written again is 1 T
1111 = Delay time in number of instruction cycles is 2,048 cycles
1110 = Delay time in number of instruction cycles is 1,024 cycles
1101 = Delay time in number of instruction cycles is 896 cycles
1100 = Delay time in number of instruction cycles is 768 cycles
1011 = Delay time in number of instruction cycles is 640 cycles
1010 = Delay time in number of instruction cycles is 512 cycles
1001 = Delay time in number of instruction cycles is 384 cycles
1000 = Delay time in number of instruction cycles is 256 cycles
0111 = Delay time in number of instruction cycles is 128 cycles
0110 = Delay time in number of instruction cycles is 64 cycles
0101 = Delay time in number of instruction cycles is 32 cycles
0100 = Delay time in number of instruction cycles is 16 cycles
0011 = Delay time in number of instruction cycles is 8 cycles
0010 = Delay time in number of instruction cycles is 4 cycles
0001 = Delay time in number of instruction cycles is 2 cycles
0000 = Delay time in number of instruction cycles is 1 cycle
DLYCYC2
R/W-0
DMACON2: DMA CONTROL REGISTER 2 (ACCESS F86h)
W = Writable bit
‘1’ = Bit is set
DLYCYC1
R/W-0
CY
cycles before the SSP2BUF register is written again for the next transfer.
DLYCYC0
R/W-0
CY
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
+ (base overhead of hardware).
INTLVL3
PIC18F46J11 FAMILY
R/W-0
to control how much time the module will Idle between
bytes in a transfer. By default, the hardware requires a
minimum delay of: 8 T
and 15 T
added with the DLYCYC bits. In SPI Slave modes, the
DLYCYC<3:0> bits may optionally be used to trigger an
additional time-out based interrupt.
CY
INTLVL2
for F
R/W-0
OSC
CY
/64. Additional delays can be
for F
x = Bit is unknown
INTLVL1
CY
R/W-0
OSC
cycles from the latest
/4, 9 T
DS39932C-page 279
CY
for F
INTLVL0
R/W-0
OSC
bit 0
/16
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