Datasheet

PIC18F97J94 FAMILY

DS30575A-page 444  2012 Microchip Technology Inc.

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

BUFS

(1)

SMPI4 SMPI3 SMPI2 SMPI1 SMPI0 BUFM

(1)

ALTS

bit 7 bit 0

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

bit 7 BUFS: Buffer Fill Status bit

(1)

1 = A/D is filling the upper half of the buffer; user should access data in the lower half

0 = A/D is filling the lower half of the buffer; user should access data in the upper half

bit 6-2 SMPI<4:0>: Interrupt Sample Increment Rate Select bits

Selects the number of sample/conversions per each interrupt.

11111 = Interrupt/address increment at the completion of conversion for each 32nd sample

11110 = Interrupt/address increment at the completion of conversion for each 31st sample



00001 = Interrupt/address increment at the completion of conversion for every other sample

00000 = Interrupt/address increment at the completion of conversion for each sample

bit 1 BUFM: Buffer Fill Mode Select bit

(1)

1 = A/D buffer is two, 13-word buffers, starting at ADC1BUF0 and ADC1BUF12, and sequential

conversions fill the buffers alternately (Split mode)

0 = A/D buffer is a single, 26-word buffer and fills sequentially from ADC1BUF0 (FIFO mode)

bit 0 ALTS: Alternate Input Sample Mode Select bit

1 = Uses channel input selects for Sample A on first sample and Sample B on next sample

0 = Always uses channel input selects for Sample A

Note 1: These bits are only applicable when the buffer is used in FIFO mode (BUFREGEN = 0). In addition, BUFS

is only used when BUFM = 1.