參數(shù)資料
型號: GS816118AGT-200IT
廠商: GSI TECHNOLOGY
元件分類: SRAM
英文描述: 1M X 18 CACHE SRAM, 6.5 ns, PQFP100
封裝: TQFP-100
文件頁數(shù): 18/34頁
文件大?。?/td> 703K
代理商: GS816118AGT-200IT
Rev: 1.03a 45/2003
25/34
2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS816118A(T/D)/GS816132A(D)/GS816136A(T/D)
Preliminary
JTAG TAP Block Diagram
Identification (ID) Register
The ID Register is a 32-bit register that is loaded with a device and vendor specific 32-bit code when the controller is put in
Capture-DR state with the IDCODE command loaded in the Instruction Register. The code is loaded from a 32-bit on-chip ROM.
It describes various attributes of the RAM as indicated below. The register is then placed between the TDI and TDO pins when the
controller is moved into Shift-DR state. Bit 0 in the register is the LSB and the first to reach TDO when shifting begins.
Tap Controller Instruction Set
Overview
There are two classes of instructions defined in the Standard 1149.1-1990; the standard (Public) instructions, and device specific
(Private) instructions. Some Public instructions are mandatory for 1149.1 compliance. Optional Public instructions must be
implemented in prescribed ways. The TAP on this device may be used to monitor all input and I/O pads, and can be used to load
address, data or control signals into the RAM or to preload the I/O buffers.
When the TAP controller is placed in Capture-IR state the two least significant bits of the instruction register are loaded with 01.
When the controller is moved to the Shift-IR state the Instruction Register is placed between TDI and TDO. In this state the desired
instruction is serially loaded through the TDI input (while the previous contents are shifted out at TDO). For all instructions, the
TAP executes newly loaded instructions only when the controller is moved to Update-IR state. The TAP instruction set for this
device is listed in the following table.
ID Register Contents
Die
Revision
Code
Not Used
I/O
Configuration
GSI Technology
JEDEC Vendor
ID Code
Presence
Register
Bit # 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
0
x36
X X X X
0
000000
0000010
00
0
0 0 1 1 0 1 1 0 0 1
1
x18
X X X X
0
000000
0000010
10
0
0 0 1 1 0 1 1 0 0 1
1
Instruction Register
ID Code Register
Boundary Scan Register
0
1
2
0
1
2
31 30 29
0
1
2
n
0
Bypass Register
TDI
TDO
TMS
TCK
Test Access Port (TAP) Controller
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