
ADSP-BF522/ADSP-BF523/ADSP-BF524/ADSP-BF525/ADSP-BF526/ADSP-BF527
NAND Flash Controller Interface Timing
Page 46 describe NAND Flash Controller Interface operations.
Table 36. NAND Flash Controller Interface Timing
V DDEXT
1.8 V Nominal
V DDEXT
2.5 V or 3.3 V Nominal
Parameter
Min
Min
Unit
Write Cycle
Switching Characteristics
t CWL
t CH
t CLEWL
t CLH
t ALEWL
t ALH
t WP1
t WHWL
t WC1
t DWS1
t DWH
ND_CE Setup Time to AWE Low
ND_CE Hold Time From AWE High
ND_CLE Setup Time to AWE Low
ND_CLE Hold Time From AWE high
ND_ALE Setup Time to AWE Low
ND_ALE Hold Time From AWE High
AWE Low to AWE high
AWE High to AWE Low
AWE Low to AWE Low
Data Setup Time for a Write Access
Data Hold Time for a Write Access
1.0 × t SCLK – 4
3.0 × t SCLK – 4
0.0
2.5 × t SCLK – 4
0.0
2.5 × t SCLK – 4
(WR_DLY +1.0) × t SCLK – 4
4.0 × t SCLK – 4
(WR_DLY +5.0) × t SCLK – 4
(WR_DLY +1.5) × t SCLK – 4
2.5 × t SCLK – 4
1.0 × t SCLK – 4
3.0 × t SCLK – 4
0.0
2.5 × t SCLK – 4
0.0
2.5 × t SCLK – 4
(WR_DLY +1.0) × t SCLK – 4
4.0 × t SCLK – 4
(WR_DLY +5.0) × t SCLK – 4
(WR_DLY +1.5) × t SCLK – 4
2.5 × t SCLK – 4
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Read Cycle
Switching Characteristics
t CRL
t CRH
ND_CE Setup Time to ARE Low
ND_CE Hold Time From ARE High
1.0 × t SCLK – 4
3.0 × t SCLK – 4
1.0 × t SCLK – 4
3.0 × t SCLK – 4
ns
ns
t RP
ARE Low to ARE High
(RD_DLY +1.0) × t SCLK – 4
(RD_DLY +1.0) × t SCLK – 4
ns
t RHRL
t RC1
ARE High to ARE Low
ARE Low to ARE Low
4.0 × t SCLK – 4
(RD_DLY +5.0) × t SCLK – 4
4.0 × t SCLK – 4
(RD_DLY +5.0) × t SCLK – 4
ns
ns
Timing Requirements (ADSP-BF522/ADSP-BF524/ADSP-BF526)
t DRS
t DRH
Data Setup Time for a Read Transaction
Data Hold Time for a Read Transaction
14.0
0.0
10.0
0.0
ns
ns
Timing Requirements (ADSP-BF523/ADSP-BF525/ADSP-BF527)
t DRS
t DRH
Data Setup Time for a Read Transaction
Data Hold Time for a Read Transaction
11.0
0.0
8.0
0.0
ns
ns
Write Followed by Read
Switching Characteristic
t WHRL
AWE High to ARE Low
5.0 × t SCLK – 4
5.0 × t SCLK – 4
ns
1
WR_DLY and RD_DLY are defined in the NFC_CTL register.
Rev. D |
Page 43 of 88 | July 2013