hy57v281620f sdram 内存芯片用户手册 -pg网赌软件

hy57v281620f sdram

使用该芯片的有：

myd-lpc1788 工控板/开发板

features

voltage: vdd, vddq 3.3v supply voltage
• all device pins are compatible with lvttl interface
• 54 pin tsopii (lead free package)
• all inputs and outputs referenced to positive edge of
system clock
• data mask function by udqm, ldqm
• internal four banks operation
• auto refresh and self refresh
• 4096 refresh cycles / 64ms
programmable burst length and burst type
- 1, 2, 4, 8 or full page for sequential burst
- 1, 2, 4 or 8 for interleave burst
• programmable cas latency; 2, 3 clocks
• burst read single write operation
• operating temperature
- commercial temperature (0oc to 70oc)
- industrial temperature (-40oc to 85oc)