Shift Register Interface
Example programs are included in the EZ-Board installation directory to
demonstrate RTC functionality.
Shift Register Interface
The shift register (SR) of the ADSP-21479 processor can be used as a
serial to parallel data converter. The shift register module consists of an
18-stage serial shift register, 18-bit latch, and three-state output buffers.
The shift register and latch have separate clocks. Data is shifted into the
serial shift register on the positive-going transitions of the shift register
serial clock ( SR_SCLK ) input. The data in each flip-flop is transferred to the
respective latch on a positive-going transition of the shift register latch
clock ( SR_LAT ) input.
The shift register’s signals can be configured as follows.
? The SR_SCLK can come from any of the SPORT0–7 SCLK outputs,
PCGA/B clock, any of the DAI pins (1–8), and one dedicated pin
( SR_SCLK ).
? The SR_LAT can come from any of SPORT0–7 frame sync outputs,
PCGA/B frame sync, any of the DAI pins (1–8), and one dedicated
pin ( SR_LAT ).
? The SR_SDI input can from any of SPORT0–7 serial data outputs,
any of the DAI pins (1–8), and one dedicated pin ( SR_SDI ).
Note that the SR_SCLK , SR_LAT , and SR_SDI inputs must come from the
same source, except in case of where SR_SCLK comes from PCGA/B or
SR_SCLK and SR_LAT come from PCGA/B.
If SR_SCLK comes from PCGA/B, then SPORT0–7 generate SR_LAT and
SR_SDI signals. If SR_SCLK and SR_LAT come from PCGA/B, then SPORT0–7
generate SR_SDI signal.
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ADSP-21479 EZ-Board Evaluation System Manual
相关PDF资料
ADZS-21489-EZLITE KIT EVAL EZ BOARD ADSP-2148X
ADZS-218X-ICE-2.5V EMULATOR SRL FOR ADDS-218X-ICE
ADZS-BF506F-EZLITE KIT EVAL EZLITE ADSP-BF506F
ADZS-BF518F-EZLITE KIT EZ LITE BF512F/14F/16F/18F
ADZS-BF527-EZLITE BOARD EVAL ADSP-BF527
ADZS-BF533-EZLITE KIT W/BOARD EVAL FOR ADSP-BF533
ADZS-BF538F-EZLITE BOARD EVAL FOR ADSP-BF538
ADZS-BF561-EZLITE BOARD EVAL ADSP-BF561
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