TMS320C6A8167 Datasheet, PDF (189/280 Pages) Texas Instruments – TMS320C6A816x Integra DSP+ARM Processors

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8.6.2.2 GPMC/NOR Flash Interface Asynchronous Mode Timing
TMS320C6A8168
TMS320C6A8167
SPRS680 – OCTOBER 2010
Table 8-22. GPMC/NOR Flash Interface Asynchronous Mode Timing - Internal Parameters
NO.
1 Max. output data generation delay from internal functional clock
2 Max. input data capture delay by internal functional clock
3 Max. chip select generation delay from internal functional clock
4 Max. address generation delay from internal functional clock
5 Max. address valid generation delay from internal functional clock
6 Max. byte enable generation delay from internal functional clock
7 Max. output enable generation delay from internal functional clock
8 Max. write enable generation delay from internal functional clock
9 Max. functional clock skew
MIN
MAX
6.5
4
6.5
6.5
6.5
6.5
6.5
6.5
100
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ps
Table 8-23. Timing Requirements for GPMC/NOR Flash Interface - Asynchronous Mode
(see Figure 8-17, Figure 8-18, Figure 8-19, Figure 8-21)
NO.
6 t_acc(DAT)
21 t_{acc1-pgmode(DAT)}
22 t_{acc2-pgmode(DAT)}
Data maximum access time (GPMC_FCLK cycles)
Page mode successive data maximum access time (GPMC_FCLK
cycles)
Page mode first data maximum access time (GPMC_FCLK cycles)
MIN
MAX
H ⁽¹⁾
P ⁽²⁾
H ⁽¹⁾
(1) H = AccessTime * (TimeParaGranularity + 1)
(2) P = PageBurstAccessTime * (TimeParaGranularity + 1).
UNIT
cycles
cycles
cycles
Table 8-24. Switching Characteristics Over Recommended Operating Conditions for GPMC/NOR Flash
Interface - Asynchronous Mode
(see Figure 8-17, Figure 8-18, Figure 8-19, Figure 8-20, Figure 8-21, Figure 8-22)
NO.
1 t_w(nBEV)
2 t_w(nCSV)
4 t_{d(nCSV-nADVIV)}
5 t_{d(nCSV-nOEIV)}
10 t_d(AV-nCSV)
11 t_d(nBEV-nCSV)
13 t_{d(nCSV-nADVV)}
14 t_d(nCSV-nOEV)
PARAMETER
Pulse duration, GPMC_BE0_CLE, GPMC_BE1 valid time
Pulse duration, GPMC_CS[x] low
Delay time, GPMC_CS[x] valid to GPMC_NADV_ALE invalid
Delay time, GPMC_CS[x] valid to GPMC_OE_RE invalid (single
read)
Delay time, address bus valid to GPMC_CS[x] valid
Delay time, GPMC_BE0_CLE, GPMC_BE1 valid to GPMC_CS[x]
valid
Delay time, GPMC_CS[x] valid to GPMC_ADV_ALE valid
Delay time, GPMC_CS[x] valid to GPMC_OE_RE valid
MIN
B - 0.2⁽³⁾
C - 0.2⁽⁴⁾
J - 0.2⁽⁵⁾
J - 0.2⁽⁵⁾
K - 0.2⁽⁶⁾
L - 0.2⁽⁷⁾
MAX
N ⁽¹⁾
A ⁽²⁾
B + 2.0⁽³⁾
C + 2.0⁽⁴⁾
J + 2.0⁽⁵⁾
J + 2.0⁽⁵⁾
K + 2.0⁽⁶⁾
L + 2.0⁽⁷⁾
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
(1) For single read: N = RdCycleTime * (TimeParaGranularity + 1) * GPMC_FCLK
For single write: N = WrCycleTime * (TimeParaGranularity + 1) * GPMC_FCLK
For burst read: N = (RdCycleTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK
For burst write: N = (WrCycleTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK
(2) For single read: A = (CSRdOffTime - CSOnTime) * (TimeParaGranularity + 1) * GPMC_FCLK
For single write: A = (CSWrOffTime - CSOnTime) * (TimeParaGranularity + 1) * GPMC_FCLK
For burst read: A = (CSRdOffTime - CSOnTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK
For burst write: A = (CSWrOffTime - CSOnTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK
(3) = B - nCS Max Delay + nADV Min Delay
For reading: B = ((ADVRdOffTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (ADVExtraDelay - CSExtraDelay)) * GPMC_FCLK
For writing: B = ((ADVWrOffTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (ADVExtraDelay - CSExtraDelay)) * GPMC_FCLK
(4) = C - nCS Max Delay + nOE Min Delay
C = ((OEOffTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (OEExtraDelay - CSExtraDelay)) * GPMC_FCLK
(5) = J - Address Max Delay + nCS Min Delay
J = (CSOnTime * (TimeParaGranularity + 1) + 0.5 * CSExtraDelay) * GPMC_FCLK
(6) = K - nCS Max Delay + nADV Min Delay
K = ((ADVOnTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (ADVExtraDelay - CSExtraDelay)) * GPMC_FCLK
(7) = L - nCS Max Delay + nOE Min Delay
L = ((OEOnTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (OEExtraDelay - CSExtraDelay)) * GPMC_FCLK
Copyright © 2010, Texas Instruments Incorporated
Peripheral Information and Timings 189
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