參數(shù)資料
型號(hào)： IS66WVD409616ALL-7010BLI
元件分類： SRAM
英文描述： 4M X 16 PSEUDO STATIC RAM, 70 ns, PBGA54
封裝： 8 X 6 MM, MO-207, VFBGA-54
文件頁(yè)數(shù)： 14/52頁(yè)
文件大?。?/td> 1128K
代理商： IS66WVD409616ALL-7010BLI
IS66WVD409616ALL
Advanced Information
21
Rev.00A | January 2010
www.issi.com - SRAM@issi.com
Bus Configuration Register
The BCR defines how the CellularRAM device interacts with the system memory bus.
Table 3 describes the control bits in the BCR. At power-up, the BCR is set to 1D1Fh.
The BCR is accessed using CRE and A[19:18] = 10b, or through the configuration
register software sequence with ADQ[15:0] = 0001h on the third cycle.
Bit Number
Definition
Remark
21-20
Reserved
Must be set to “0”
19 – 18
Register Select
00 = Select RCR
01 = Select DIDR
10 = Select BCR
17 – 16
Reserved
Must be set to “0”
15
Operating mode
0 = Synchronous burst access mode (default)
1 = Asynchronous access mode
14
Initial Latency
0 = Variable (default)
1 = Fixed
13 – 11
Latency Count
000 = 9 clock cycles
001 = reserved
010 = 3 clock cycles
011 = 4 clock cycles (default)
100 = 5 clock cycles
101 = 6 clock cycles
110 = 7 clock cycles
111 = reserved
10
WAIT Polarity
0 = Active LOW : Data valid at WAIT HIGH
1 = Active HIGH : Data valid at WAIT LOW (default)
9
Reserved
Must be set to “0”
8
WAIT Configuration
0 = Asserted during delay
1 = Asserted one data cycle before delay (default)
7 – 6
Reserved
Must be set to “0”
5 – 4
Output Impedance
00 = Full drive
01 = Drive (default)
10 = Drive
11 = Reserved
3
Burst mode
0 = Burst wrap within the burst length
1 = Burst no wrap (default)
2 – 0
Burst Length
001 = 4 words
010 = 8 words
011 = 16 words
111 = continuous (default)
Others = Reserved
Table 3. Bus configuration Register
Notes :
1.Burst wrap and length apply to both READ and WRITE operations.
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IS66WVE1M16BLL-55BLI 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 16Mb 1M x 16 55ns Pseudo 靜態(tài)隨機(jī)存取存儲(chǔ)器 RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪問(wèn)時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray
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