參數資料
型號： SM320C6414DGADW60
廠商： TEXAS INSTRUMENTS INC
元件分類： 數字信號處理
英文描述： 64-BIT, 75 MHz, OTHER DSP, CPGA570
封裝： 33 X 33 MM, CERAMIC, FCPGA-570
文件頁數： 6/134頁
文件大小： 1997K
代理商： SM320C6414DGADW60
SMJ320C6414, SMJ320C6415, SMJ320C6416
FIXEDPOINT DIGITAL SIGNAL PROCESSORS
SGUS050A JANUARY 2004 REVISED MARCH 2004
103
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
HOLD/HOLDA TIMING
timing requirements for the HOLD/HOLDA cycles for EMIFA and EMIFB modules (see Figure 35)
NO.
MIN
MAX
UNIT
3
toh(HOLDAL-HOLDL) Hold time, HOLD low after HOLDA low
E*
ns
*This parameter is not production tested.
E = the EMIF input clock (ECLKIN, CPU/4 clock, or CPU/6 clock) period in ns for EMIFA or EMIFB.
switching characteristics over recommended operating conditions for the HOLD/HOLDA cycles
for EMIFA and EMIFB modules§ (see Figure 35)
NO.
PARAMETER
MIN
MAX
UNIT
1
td(HOLDL-EMHZ)
Delay time, HOLD low to EMIF Bus high impedance
2E*
*
ns
2
td(EMHZ-HOLDAL)
Delay time, EMIF Bus high impedance to HOLDA low
0*
2E*
ns
4
td(HOLDH-EMLZ)
Delay time, HOLD high to EMIF Bus low impedance
2E*
7E*
ns
5
td(EMLZ-HOLDAH)
Delay time, EMIF Bus low impedance to HOLDA high
0*
2E*
ns
6
td(HOLDL-EKOHZ)
Delay time, HOLD low to ECLKOUTx high impedance
2E*
*
ns
7
td(HOLDH-EKOLZ)
Delay time, HOLD high to ECLKOUTx low impedance
2E*
7E*
ns
*This parameter is not production tested.
E = the EMIF input clock (ECLKIN, CPU/4 clock, or CPU/6 clock) period in ns for EMIFA or EMIFB.
For EMIFA, EMIF Bus consists of: ACE[3:0], ABE[7:0], AED[63:0], AEA[22:3], AARE/ASDCAS/ASADS/ASRE, AAOE/ASDRAS/ASOE, and
AAWE/ASDWE/ASWE , ASDCKE, ASOE3, and APDT.
For EMIFB, EMIF Bus consists of: BCE[3:0], BBE[1:0], BED[15:0], BEA[20:1], BARE/BSDCAS/BSADS/BSRE, BAOE/BSDRAS/BSOE, and
BAWE/BSDWE/BSWE, BSOE3, and BPDT.
§ The EKxHZ bits in the EMIF Global Control register (GBLCTL) determine the state of the ECLKOUTx signals during HOLDA. If EKxHZ = 0,
ECLKOUTx continues clocking during Hold mode. If EKxHZ = 1, ECLKOUTx goes to high impedance during Hold mode, as shown in Figure 35.
All pending EMIF transactions are allowed to complete before HOLDA is asserted. If no bus transactions are occurring, then the minimum delay
time can be achieved. Also, bus hold can be indefinitely delayed by setting NOHOLD = 1.
HOLD
HOLDA
EMIF Bus
DSP Owns Bus
External Requestor
Owns Bus
DSP Owns Bus
C64x
1
3
25
4
ECLKOUTx
(EKxHZ = 0)
ECLKOUTx
(EKxHZ = 1)
6
7
For EMIFA, EMIF Bus consists of: ACE[3:0], ABE[7:0], AED[63:0], AEA[22:3], AARE/ASDCAS/ASADS/ASRE, AAOE/ASDRAS/ASOE, and
AAWE/ASDWE/ASWE, ASDCKE, ASOE3, and APDT.
For EMIFB, EMIF Bus consists of: BCE[3:0], BBE[1:0], BED[15:0], BEA[20:1], BARE/BSDCAS/BSADS/BSRE, BAOE/BSDRAS/BSOE, and
BAWE/BSDWE/BSWE, BSOE3, and BPDT.
The EKxHZ bits in the EMIF Global Control register (GBLCTL) determine the state of the ECLKOUTx signals during HOLDA. If EKxHZ = 0,
ECLKOUTx continues clocking during Hold mode. If EKxHZ = 1, ECLKOUTx goes to high impedance during Hold mode, as shown in Figure 35.
Figure 35. HOLD/HOLDA Timing for EMIFA and EMIFB
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