SMJ320C80 Datasheet, PDF (67/157 Pages) Texas Instruments – DIGITAL SIGNAL PROCESSOR

SMJ320C80
DIGITAL SIGNAL PROCESSOR
SGUS025B – AUGUST 1998 – REVISED JUNE 2002
local memory interface
status codes
Status codes are output on STATUS[5:0] to describe the cycle being performed. During row time, STATUS[5:0]
pins indicate the type of cycle being performed. The cycle type can be latched using RL or RAS and used by
external logic to perform memory bank decoding or to enable special hardware features. During column time,
the STATUS[5:0] pins indicate the requesting processor or special column information.
Table 29. Row-Time Status Codes
STATUS[5:0]
00000 0
00000 1
00001 0
00001 1
00010 0
00010 1
00011 0
00011 1
00100 0
00100 1
00101 0
00101 1
00110 0
00110 1
00111 0
00111 1
01000 0
01000 1
01001 0
01001 1
01010 0
01010 1
01011 0
01011 1
01100 0
01100 1
01101 0
01101 1
01110 0
01110 1
01111 0
01111 1
CYCLE TYPE
Normal Read
Normal Write
Refresh
SDRAM DCAB
Peripheral Device PT Read
Peripheral Device PT Write
Reserved
Reserved
Reserved
Block-Write PT
Reserved
Reserved
SDRAM MRS
Load Color Register
Reserved
Reserved
Frame 0 Read Transfer
Frame 0 Write Transfer
Frame 0 Split-Read Transfer
Frame 0 Split-Write Transfer
Frame 1 Read Transfer
Frame 1 Write Transfer
Frame 1 Split-Read Transfer
Frame 1 Split-Write Transfer
Reserved
Reserved
Reserved
Reserved
PT Read Transfer
PT Write Transfer
Reserved
Idle
STATUS[5:0]
10000 0
10000 1
10001 0
10001 1
10010 0
10010 1
10011 0
10011 1
10100 0
10100 1
10101 0
10101 1
10110 0
10110 1
10111 0
10111 1
11000 0
11000 1
11001 0
11001 1
11010 0
11010 1
11011 0
11011 1
11100 0
11100 1
11101 0
11101 1
11110 0
11110 1
11111 0
11111 1
CYCLE TYPE
Reserved
Reserved
Reserved
Reserved
XPT1 Read
XPT1 Write
XPT1 PDPT Read
XPT1 PDPT Write
XPT2 Read
XPT2 Write
XPT2 PDPT Read
XPT2 PDPT Write
XPT3 Read
XPT3 Write
XPT3 PDPT Read
XPT3 PDPT Write
XPT4/SAM1 Read
XPT4/SAM1 Write
XPT4/SAM1 PDPT Read
XPT4/SAM1 PDPT Write
XPT5/SOF1 Read
XPT5/SOF1 Write
XPT5/SOF1 PDPT Read
XPT5/SOF1 PDPT Write
XPT6/SAM0 Read
XPT6/SAM0 Write
XPT6/SAM0 PDPT Read
XPT6/SAM0 PDPT Write
XPT7/SOF0 Read
XPT7/SOF0 Write
XPT7/SOF0 PDPT Read
XPT7/SOF0 PDPT Write
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