參數(shù)資料
型號: STPCI2EEYC
廠商: STMICROELECTRONICS
元件分類: 外設(shè)及接口
英文描述: MULTIFUNCTION PERIPHERAL, PBGA516
封裝: PLASTIC, BGA-516
文件頁數(shù): 7/80頁
文件大小: 854K
代理商: STPCI2EEYC
STRAP OPTION
15/80
Issue 0.4 - July 16, 2001
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
2.1.2. STRAP REGISTER 1
STRAP1
Access = 0022h/0023h
Regoffset =04Bh
76543210
MD[40]
MD[14]
Rsd
Rsv
Rsd
MD[36]
This register defaults to the values sampled on the MD pins after reset
Bit Number Sampled
Mnemonic
Description
Bits 7-6
MD[40] & MD[14]
CPU Clock Multiplication (486 mode):
MD40 MD14
0
Reserved
01
X 1
1
0 Reserved
11
X 2
The default is pull down resistor to MD[40], pull up resistor to MD[14], to
select DX1 mode.
Bits 5-2
Rsv
Reserved
Bit 1
Rsv
Reserved
Bit 0
MD[36]
These bits reflect the values sampled on MD[36] and deter-
mines the Local Bus Boot device width:
0: 8-bit Boot Device
1: 16-bit Boot Device
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