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参数资料
| 型号： | AS7C25512PFS32A-225BC |
| 厂商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分类： | SRAM |
| 英文描述： | 512K X 32 STANDARD SRAM, 6.9 ns, PBGA165 |
| 封装： | BGA-165 |
| 文件页数： | 21/21页 |
| 文件大小： | 458K |
| 代理商： | AS7C25512PFS32A-225BC |
12/2/02, v. 0.9.1
Alliance Semiconductor
9 of 21
AS7C25512PFS32A
AS7C25512PFS36A
IEEE 1149.1 serial boundary scan (JTAG)
The SRAM incorporates a serial boundary scan test access port (TAP). The port operates in accordance with IEEE Standard 1149.1-1990 but
does not have the set of functions required for full 1149.1 compliance. The inclusion of these functions would place an added delay in the
critical speed path of the SRAM. The TAP controller functionality does not conflict with the operation of other devices using 1149.1 fully
compliant TAPs. It uses JEDEC-standard 2.5V I/O logic levels.
The SRAM contains a TAP controller, instruction register, boundary scan register, bypass register, and ID register.
Disabling the JTAG feature
If the JTAG function is not being implemented, its pins/balls can be left unconnected. At power-up, the device will come up in a reset state
which will not interfere with the operation of the device.
Test access port (TAP)
Test clock (TCK)
The test clock is used with only the TAP controller. All inputs are captured on the rising edge of TCK. All outputs are driven from the falling
edge of TCK.
Test mode select (TMS)
The TAP controller receives commands from TMS input. It is sampled on the rising edge of TCK. You can leave this pin/ball unconnected if the
TAP is not used. The pin/ball is pulled up internally, resulting in a logic high level.
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TAP controller state diagram
TAP controller block diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS7C25512PFS36A-133TQC | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:2.5V 512K x 32/36 pipelined burst synchronous SRAM |
| AS7C25512PFS36A-133TQCN | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:2.5V 512K x 32/36 pipelined burst synchronous SRAM |
| AS7C25512PFS36A-133TQI | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:2.5V 512K x 32/36 pipelined burst synchronous SRAM |
| AS7C25512PFS36A-133TQIN | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:2.5V 512K x 32/36 pipelined burst synchronous SRAM |
| AS7C25512PFS36A-166TQC | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:2.5V 512K x 32/36 pipelined burst synchronous SRAM |
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