參數(shù)資料
型號: MSC8122MP8000
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 數(shù)字信號處理
英文描述: 32-BIT, 500 MHz, OTHER DSP, PBGA431
封裝: FCBGA-431
文件頁數(shù): 21/48頁
文件大?。?/td> 1158K
代理商: MSC8122MP8000
MSC8122 Quad Digital Signal Processor Data Sheet, Rev. 16
Electrical Characteristics
Freescale Semiconductor
28
2.5.6
DSI Timing
The timings in the following sections are based on a 20 pF capacitive load.
2.5.6.1 DSI Asynchronous Mode
Table 18. DSI Asynchronous Mode Timing
No.
Characteristics
Min
Max
Unit
100
Attributes1 set-up time before strobe (HWBS[n]) assertion
1.5
ns
101
Attributes1 hold time after data strobe deassertion
1.3
ns
102
Read/Write data strobe deassertion width:
DCR[HTAAD] = 1
— Consecutive access to the same DSI
— Different device with DCR[HTADT] = 01
— Different device with DCR[HTADT] = 10
— Different device with DCR[HTADT] = 11
DCR[HTAAD] = 0
1.8 + TREFCLK
5 + TREFCLK
5 + (1.5
× TREFCLK)
5 + (2.5
× TREFCLK)
1.8 + TREFCLK
ns
103
Read data strobe deassertion to output data high impedance
8.5
ns
104
Read data strobe assertion to output data active from high impedance
2.0
ns
105
Output data hold time after read data strobe deassertion
2.2
ns
106
Read/Write data strobe assertion to HTA active from high impedance
2.2
ns
107
Output data valid to HTA assertion
3.2
ns
108
Read/Write data strobe assertion to HTA valid2
1.1 V core
1.2 V core
7.4
6.7
ns
109
Read/Write data strobe deassertion to output HTA high impedance.
(DCR[HTAAD] = 0, HTA at end of access released at logic 0)
—6.5
ns
110
Read/Write data strobe deassertion to output HTA deassertion.
(DCR[HTAAD] = 1, HTA at end of access released at logic 1)
—6.5
ns
111
Read/Write data strobe deassertion to output HTA high impedance.
(DCR[HTAAD] = 1, HTA at end of access released at logic 1
DCR[HTADT] = 01
DCR[HTADT] = 10
DCR[HTADT] = 11
5 + TREFCLK
5 + (1.5
× TREFCLK)
5 + (2.5
× TREFCLK)
ns
112
Read/Write data strobe assertion width
1.8 + TREFCLK
—ns
201
Host data input set-up time before write data strobe deassertion
1.0
ns
202
Host data input hold time after write data strobe deassertion
1.1 V core
1.2 V core
1.7
1.5
ns
Notes:
1.
Attributes refers to the following signals: HCS, HA[11–29], HCID[0–4], HDST, HRW, HRDS, and HWBSn.
2.
This specification is tested in dual-strobe mode. Timing in single-strobe mode is guaranteed by design.
3.
All values listed in this table are tested or guaranteed by design.
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