參數(shù)資料
型號(hào): 82845PE
廠商: Intel Corp.
英文描述: 82845GE Graphics and Memory Controller Hub (GMCH) and 82845PE Memory Controller Hub (MCH)
中文描述: 82845GE圖形和內(nèi)存控制器中樞(GMCH)和82845PE內(nèi)存控制器中樞(MCH)
文件頁(yè)數(shù): 48/157頁(yè)
文件大小: 1407K
代理商: 82845PE
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Intel
82845MP/82845MZ Chipset-Mobile (MCH-M)
48
Datasheet
250687-002
R
3.6.6.
RCVENSTR – Strength Control Register for RCVENOUT#
Signals
Address Offset:
34h
Default Value:
00h
Access:
Read Only, Read/Write
Size:
8 bits
This register controls the drive strength of the I/O buffers for the Receive Enable Out (RCVENOUT#)
signal.
Bit
Descriptions
7:3
Reserved
2:0
RCVEnOut# Strength Control:
Sets drive strength as shown below:
000
= 0.75 X (default)
001
= 1.00 X
010
= 1.25 X
011
= 1.50 X
100
= 2.00 X
101
= 2.50 X
110
= 3.00 X
111
= 4.00 X
3.7.
Host-Hub Interface Bridge Device Registers – Device
#0
Table 20 shows the access attributes for the configuration space. An “s” in the Default Value field means
that a strap determines the power-up default value for that bit. Table 21 below summarizes the MCH-M
configuration space for Device #0.
Table 20. Nomenclature for Access Attributes
RO
Read Only.
If a register is read only, writes to this register have no effect.
R/W
Read/Write.
A register with this attribute can be read and written.
R/W/L
Read/Write/Lock
A register with this attribute can be read, written, and Lock.
R/WC
Read/Write Clear.
A register bit with this attribute can be read and written. However, a write of a 1
clears (sets to 0) the corresponding bit and a write of a 0 has no effect.
R/WO
Read/Write Once.
A register bit with this attribute can be written to only once after power up. After the
first write, the bit becomes read only.
L
Lock
. A register bit with this attribute becomes Read Only after a lock bit is set.
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