Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 686

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Operating Modes
SW RESET
HW RESET
DAI_PB08-01_O
8
PCG_CLKA_O
PCG_CLKB_O
PCG_FSA_O
PCG_FSB_O
SR_SDI*
SR_SCLK*
SR_LAT*
SPx_DA/DB_O
SPx_FS_O
SPx_CLK_O
*DEDICATED EXTERNAL PINS
(NOT DAI/DPI PINS)
Figure 17-1. SR Block Diagram
Operating Modes
This section describes the two operation modes used by the shift register.
Serial Data Output
The shift register outputs serial data on the
bits in the
SR_SDO_SEL
of the 18-bit stream are moved to the serial output. By default if all the
bits are cleared, the LSB data is output. This mode is for use-
SR_SDO_SEL
ful if multiple SR registers need to be cascaded.
17-6
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SR RESET
CLR
SR_SCLK_I
SR_SDI_I
SRU
SR_LAT_I
EN
CLR
SHIFT REGISTER BLOCK
SR_CTL[0]
register. These bits select which serial data
SR_CTL
ADSP-214xx SHARC Processor Hardware Reference
18-STAGE
SHIFT REGISTER
18
18
18-BIT
LATCH
pins based on the
SR_SDO
SR_CTL[6-2]
5
SR_SDO
SR_LDO[17-0]
18
OE
I/O BUFFERS

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