RG82845M Intel, RG82845M Datasheet - Page 48

• Manufacturer Part Number: RG82845M
• Description: Chipset Memory Controller Hub Mobile
• Manufacturer: Intel

Intel
3.6.6.
3.7.
48
Table 20. Nomenclature for Access Attributes
®
82845MP/82845MZ Chipset-Mobile (MCH-M)
RCVENSTR – Strength Control Register for RCVENOUT#
Signals
Address Offset:
Default Value:
Access:
Size:
This register controls the drive strength of the I/O buffers for the Receive Enable Out (RCVENOUT#)
signal.
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.
7:3
2:0
R/W/L
R/WC
R/WO
R/W
RO
Bit
L
Read Only. If a register is read only, writes to this register have no effect.
Read/Write. A register with this attribute can be read and written.
Read/Write/Lock A register with this attribute can be read, written, and Lock.
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.
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.
Lock. A register bit with this attribute becomes Read Only after a lock bit is set.
Reserved
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
34h
00h
Read Only, Read/Write
8 bits
Datasheet
Descriptions
250687-002
R