DSP56857 datasheet(582/662 Pages) FREESCALE

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Date:

Programmer:

Sheet

Appendix B - Programmer’s Sheets, Rev. 4

Freescale Semiconductor

B-80

Preliminary

13 of 16

ESSI FIFO Control/Status Register (SFCSR)

ESSI FIFO

Control/Status

Base + $B

Bits

Read

RFCNT

TFCNT

RFWM

TFWM

Write

Reset

0000

1000

0001

denotes Reserved Bits

Bits

Name

Description

15 - 12

RFCNT

Receive FIFO Counter

This read-only bit field indicates the number of data words in the RXFIFO. Following

demonstrates the RFCNT bit field encoding.

0000 0 Data words in RXFIFO

0001 1 Data word in RXFIFO

0010 2 Data words in RXFIFO

0011 3 Data words in RXFIFO

0100 4 Data words in RXFIFO

0101 5 Data words in RXFIFO

0110 6 Data words in RXFIFO

0111 7 Data words in RXFIFO

1000 8 Data words in RXFIFO

11 - 8

TFCNT

Transmit FIFO Counter

This read-only bit field indicates the number of data words in the TXFIFO. Following

demonstrates the TFCNT bit field encoding.

0000 0 Data words in TXFIFO

0001 1 Data word in TXFIFO

0010 2 Data words in TXFIFO

0011 3 Data words in TXFIFO

0100 4 Data words in TXFIFO

0101 5 Data words in TXFIFO

0110 6 Data words in TXFIFO

0111 7 Data words in TXFIFO

1000 8 Data words in TXFIFO

ESSI

See the following page for continuation of this register

DSP56857 Datasheet(PDF) 582 Page - Freescale Semiconductor, Inc

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