80930HD 查看數據表（PDF） - Intel
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80930HD Datasheet PDF : 38 Pages
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8x930Hx UNIVERSAL SERIAL BUS PERIPHERAL CONTROLLER
Signal
Name
WR#
XTAL1
XTAL2
Table 10. Signal Description (Sheet 4 of 4)
Type
Description
O Write. Write signal output to external memory (See Table 11).
I Oscillator Amplifier Input. When implementing the on-chip
oscillator, connect the external crystal/resonator across XTAL1
and XTAL2. If an external clock source is used, then connect it
to this pin.
O Oscillator Amplifier Output. When implementing the on-chip
oscillator, connect the external crystal/resonator across XTAL1
and XTAL2. If an external oscillator is used, then leave XTAL2
unconnected.
Alternate
Function
P3.6
—
—
Table 11. Memory Signal Selections (RD1:0) †
RD1:0
A17/P1.7/
CEX4/WCLK
A16/P3.7/RD#
PSEN#
WR#
0 0 A17
A16
Asserted for Asserted for writes to
all addresses all memory locations
0 1 P1.7/CEX4/WCLK A16
Asserted for Asserted for writes to
all addresses all memory locations
1 0 P1.7/CEX4/WCLK P3.7 only
Asserted for Asserted for writes to
all addresses all memory locations
1 1 P1.7/CEX4/WCLK RD# asserted Asserted for Asserted only for
for addresses addresses writes to MCS® 51
≤ 7F:FFFFH ≥ 80:0000H microcontroller data
memory locations.
Features
256-Kbyte external
address space
128-Kbyte external
address space
64-Kbyte external
address space
One additional port
pin
Compatible with MCS
51 microcontrollers.
Separate 64-Kbyte
external program
and data memories.
† RD1:0 are bits 3:2 of configuration byte UCONFIG0. Refer to Figure 4-3 on page 4-5 in the 8x930Ax,
8x930Hx Universal Serial Bus Micorcontroller User’s Manual.
ADVANCE INFORMATION
15
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