Intel Pentium M RH80535GC0211M 데이터 시트
제품 코드
RH80535GC0211M
Datasheet
55
Package Mechanical Specifications and Pin Information
4.3
Alphabetical Signals Reference
Table 16.
Signal Description (Sheet 1 of 8)
Name
Type
Description
A[31:3]#
Input/
Output
A[31:3]# (Address) define a 2
32
-byte physical memory address
space. In sub-phase 1 of the address phase, these pins transmit the
address of a transaction. In sub-phase 2, these pins transmit
transaction type information. These signals must connect the
appropriate pins of both agents on the processor FSB. A[31:3]# are
source synchronous signals and are latched into the receiving buffers
by ADSTB[1:0]#. Address signals are used as straps which are
sampled before RESET# is deasserted.
address of a transaction. In sub-phase 2, these pins transmit
transaction type information. These signals must connect the
appropriate pins of both agents on the processor FSB. A[31:3]# are
source synchronous signals and are latched into the receiving buffers
by ADSTB[1:0]#. Address signals are used as straps which are
sampled before RESET# is deasserted.
A20M#
Input
If A20M# (Address-20 Mask) is asserted, the processor masks
physical address bit 20 (A20#) before looking up a line in any
internal cache and before driving a read/write transaction on the bus.
Asserting A20M# emulates the 8086 processor's address wrap-
around at the 1-MB boundary. Assertion of A20M# is only supported
in real mode.
A20M# is an asynchronous signal. However, to ensure recognition of
this signal following an Input/Output write instruction, it must be
valid along with the TRDY# assertion of the corresponding Input/
Output Write bus transaction.
physical address bit 20 (A20#) before looking up a line in any
internal cache and before driving a read/write transaction on the bus.
Asserting A20M# emulates the 8086 processor's address wrap-
around at the 1-MB boundary. Assertion of A20M# is only supported
in real mode.
A20M# is an asynchronous signal. However, to ensure recognition of
this signal following an Input/Output write instruction, it must be
valid along with the TRDY# assertion of the corresponding Input/
Output Write bus transaction.
ADS#
Input/
Output
ADS# (Address Strobe) is asserted to indicate the validity of the
transaction address on the A[31:3]# and REQ[4:0]# pins. All bus
agents observe the ADS# activation to begin parity checking,
protocol checking, address decode, internal snoop, or deferred reply
ID match operations associated with the new transaction.
transaction address on the A[31:3]# and REQ[4:0]# pins. All bus
agents observe the ADS# activation to begin parity checking,
protocol checking, address decode, internal snoop, or deferred reply
ID match operations associated with the new transaction.
ADSTB[1:0]#
Input/
Output
Address strobes are used to latch A[31:3]# and REQ[4:0]# on their
rising and falling edges. Strobes are associated with signals as shown
below:.
rising and falling edges. Strobes are associated with signals as shown
below:.
BCLK[1:0]
Input
The differential pair BCLK (Bus Clock) determines the FSB frequency.
All FSB agents must receive these signals to drive their outputs and
latch their inputs.
All external timing parameters are specified with respect to the rising
edge of BCLK0 crossing V
All FSB agents must receive these signals to drive their outputs and
latch their inputs.
All external timing parameters are specified with respect to the rising
edge of BCLK0 crossing V
CROSS
.
BNR#
Input/
Output
BNR# (Block Next Request) is used to assert a bus stall by any bus
agent who is unable to accept new bus transactions. During a bus
stall, the current bus owner cannot issue any new transactions.
agent who is unable to accept new bus transactions. During a bus
stall, the current bus owner cannot issue any new transactions.
BPM[2:1]#
BPM[3,0]#
BPM[3,0]#
Output
Input/
Output
BPM[3:0]# (Breakpoint Monitor) are breakpoint and performance
monitor signals. They are outputs from the processor which indicate
the status of breakpoints and programmable counters used for
monitoring processor performance. BPM[3:0]# should connect the
appropriate pins of all processor FSB agents.This includes debug or
performance monitoring tools.
For termination requirements please contact your Intel
representative.
monitor signals. They are outputs from the processor which indicate
the status of breakpoints and programmable counters used for
monitoring processor performance. BPM[3:0]# should connect the
appropriate pins of all processor FSB agents.This includes debug or
performance monitoring tools.
For termination requirements please contact your Intel
representative.
Signals
Associated
Strobe
Strobe
REQ[4:0]#, A[16:3]# ADSTB[0]#
A[31:17]#
ADSTB[1]#