LH7A404 Sharp Electronics, LH7A404 Datasheet - Page 47

• Manufacturer Part Number: LH7A404
• Manufacturer: Sharp Electronics

Specifications of LH7A404

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Processing Unit: Microcontroller
• Operating Supply Voltage (min): 1.71V
• Operating Supply Voltage (typ): 1.8V
• Operating Supply Voltage (max): 1.89V
• Package Type: CABGA
• Pin Count: 324
• Mounting: Surface Mount
• Rad Hardened: No
• Lead Free Status / RoHS Status: Not Compliant

32-Bit System-on-Chip
Synchronous Memory Controller Waveforms
chronous Burst Read (page already open). Figure 19
shows the waveform and timing for synchronous mem-
ory to activate a bank and Write.
Data Sheet
NOTES:
1. SDRAMcmd is the combination of nRAS, nCAS, nSDWE, and nSDCSx.
2. tOVXXX represents tOVRA, tOVCA, tOVSDW, or tOVSC.
3. tOHXXX represents tOHRA, tOHCA, tOHSDW, or tOHSC.
4. nDQM is static LOW.
5. SDCKE is static HIGH.
SDRAMcmd
SBANK[1:0]
NOTES:
1. SDRAMcmd is the combination of nRAS, nCAS, nSWE, and nSCSx.
2. tOVXXX represents tOVRA, tOVCA, tOVSVW, or tOVSC. Refer to the AC timing table.
3. tOHXXX represents tOHRA, tOHCA, tOHSVW, or tOHSC.
Figure 18 shows the waveform and timing for a Syn-
SA[13:0],
SDRAMcmd
D[31:0]
SCLK
SA[13:0],
SB[1:0]
D[31:0]
SCKE
SCLK
Figure 19. Synchronous Bank Activate and Write
tOVA
t OVXXX
Figure 18. Synchronous Burst Read
READ
COLUMN
BANK,
t OHXXX
t OVB
tOVC
tOVA
Version 1.5
tOVXXX
ACTIVE
tISD tIHD
BANK,
tOHXXX
tOHA
ROW
DATA n
DATA n + 1
DATA n + 2
DATA n + 3
tOVD
WRITE
COLUMN
DATA
BANK,
tOHD
LH7A404
LH7A404-13
LH7A400-24
47