AMD-762 Advanced Micro Devices, AMD-762 Datasheet - Page 103

• Manufacturer Part Number: AMD-762
• Description: System Controller
• Manufacturer: Advanced Micro Devices

24416C—December 2001
Table 34.
Chapter 7
ADSTB[1:0]
ADSTB[1:0]#
PIPE#
RBF#
WBF#
SBA[7:0]
SBSTB/SBSTB#
Signal
Signal Descriptions (Continued)
Type
STS
STS
STS
STS
B
B
I
I
I
I
I
AGP AD Bus Strobe
These signals are driven by the agent that is providing the data and are used to generate a
timing strobe for 2x AGP transfers. ADSTB[0] is used for A_AD[15:00], and ADSTB[1] is
used for A_AD[31:16].
AGP AD Bus Strobe (4x Timing)
These signals are driven by the agent that is providing the data, and are used to generate
a timing strobe for 4x AGP transfers. ADSTB[0]# is used for A_AD[15:00], and ADSTB[1]#
is used for A_AD[31:16].
APG Pipelined Request
This signal is asserted by the current master to indicate that a full-width request should be
enqueued by the AMD-762™ system controller AGP target controller. The AMD-762
system controller enqueues a new request each edge of AGPCLK while the PIPE# signal is
asserted.
AGP Read Buffer Full
This signal indicates that the AGP master’s input buffer is full, and that it cannot accept
more read data. When this signal is asserted by the AGP master, the AMD-762 system
controller does not attempt to return previously requested low-priority read data.
AGP Write Buffer Full
This signal indicates that the AGP master cannot accept more fast writes from the
AMD-762 system controller. When this signal is asserted by the AGP master, the AMD-762
system controller does not attempt to initiate fast writes.
AGP Sideband Address Bus
These pins provide an additional bus that can be used to pass commands (address and
data) from the AGP master to the AMD-762 system controller. The sideband bus is driven
by an external AGP master.
AGP Sideband Strobes
These strobes are driven by the AGP master to provide timing for the sideband address
bus (SBA[7:0] pins). The SBSTB# pin provides the complement of SBSTB and is used only
for AGP 4x timing mode.
Preliminary Information
Signal Descriptions
AGP-Only Signals
Description
AMD-762™ System Controller Data Sheet
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