參數(shù)資料
型號: TMS320LC546
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: Digital Signal Processors(20/25ns指令周期, 高性能,大并行度,特殊指令集可有效實現(xiàn)多種復雜算法及應用的DSP)
中文描述: 數(shù)字信號處理器(20/25ns指令周期,高性能,大并行度,特殊指令集可有效實現(xiàn)多種復雜算法及應用的數(shù)字信號處理器)
文件頁數(shù): 97/107頁
文件大?。?/td> 2149K
代理商: TMS320LC546
TMS320C54x, TMS320LC54x
FIXED-POINT DIGITAL SIGNAL PROCESSORS
SPRS039A – FEBRUARY 1996 – REVISED JULY 1997
94
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
host port interface timing
switching characteristics over recommended operating conditions [H = 0.5t
c(CO)
]
(See Notes 5 and 6) (see Figure 38 through Figure 41)
PARAMETER
’C54x-40
’C54x-50
’C54x-66
UNIT
MIN
5
MAX
12
td(DSL-HDV)
Delay time, DS low to HD driven
ns
td(HEL-HDV1)
Delay time, HDS falling to HD valid for first byte of a non-subsequent
read:
max 20 ns §
Case 1: Shared-access mode if tw(DSH) < 7H
Case 2: Shared-access mode if tw(DSH) > 7H
Case 3: Host-only mode if tw(DSH) < 20 ns
Case 4: Host-only mode if tw(DSH) > 20 ns
Delay time, DS low to HD valid, second byte
7H+20–tw(DSH)
20
40–tw(DSH)
20
ns
td(DSL-HDV2)
td(DSH-HYH)
tsu(HDV-HYH)
th(DSH-HDV)
td(COH-HYH)
td(DSH-HYL)
td(COH-HTX)
Values derived from characterization data and not tested
Values assured by design but not tested
§Host-only mode timings apply for read accesses to HPIC or HPIA, write accesses to BOB, and resetting DSPINT or HINT to 0 in shared-access
mode. HRDY does not go low for these accesses.
Shared-access mode timings will be met automatically if HRDY is used.
#HD release
NOTES:
5. SAM = shared-access mode, HOM = host-only mode
HAD stands for HCNTRL0, HCNTRL1, and HR/W.
HDS refers to either HDS1 or HDS2.
DS refers to the logical OR of HCS and HDS.
6. On host read accesses to the HPI, the setup time of HD before DS rising edge depends on the host waveforms and cannot be
specified here.
5
20
10H+10
ns
Delay time, DS high to HRDY high
ns
Setup time, HD valid before HRDY rising edge
3H–10
ns
Hold time, HD valid after DS rising edge
0
12#
10
12
ns
Delay time, CLKOUT rising edge to HRDY high
ns
Delay time, HDS or HCS high to HRDY low
ns
Delay time, CLKOUT rising edge to HINT change
15
ns
A
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