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ADSP-21367/ADSP-21368/ADSP-21369
Rev. D
|
Page 15 of 56
|
November 2008
DATA MODES
The upper 32 data pins of the external memory interface are
muxed (using bits in the SYSCTL register) to support the exter-
nal memory interface data (input/output), the PDAP (input
only), the FLAGS (input/output), and the PWM channels (out-
put).
provides the pin settings.
BOOT MODES
CORE INSTRUCTION RATE TO CLKIN RATIO MODES
For details on processor timing, see
and
.
Table 6. Function of Data Pins
Data Pin Mode
DATA31–16
DATA15–8
DATA7–0
000
EPDATA32–0
001
FLAGS/PWM15–0
1
EPDATA15–0
010
FLAGS/PWM15–0
1
FLAGS15–8
EPDATA7–0
011
FLAGS/PWM15–0
1
FLAGS15–0
100
PDAP (DATA + CTRL)
EPDATA7–0
101
PDAP (DATA + CTRL)
FLAGS7–0
110
Reserved
111
Three-state all pins
1
These signals can be FLAGS or PWM or a mix of both. However, they can be selected only in groups of four. Their function is determined by the control signals
FLAGS/PWM_SEL. For more information, see the
ADSP-21368 SHARC Processor Hardware Reference
.
Table 7. Boot Mode Selection
BOOT_CFG1–0
Booting Mode
00
SPI Slave Boot
01
SPI Master Boot
10
EPROM/FLASH Boot
11
Reserved
Table 8. Core Instruction Rate/CLKIN Ratio Selection
CLK_CFG1–0
Core to CLKIN Ratio
00
6:1
01
32:1
10
16:1
11
Reserved