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參數(shù)資料
| 型號(hào)： | X930A |
| 廠商： | Intel Corp. |
| 英文描述： | UNIVERSAL SERIAL BUS MICROCONTROLLER |
| 中文描述： | 通用串行總線的微控制器 |
| 文件頁數(shù)： | 14/38頁 |
| 文件大?。?/td> | 283K |
| 代理商： | X930A |
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10
ADVANCE INFORMATION
8x930Ax UNIVERSAL SERIAL BUS (USB) MICROCONTROLLER
RD1:0 are bits 3:2 of configuration byte UCONFIG0. Refer to figure 4-3 on page 4-5 in the 8x930Ax Uni-
versal Serial Bus Microcontroller User’s Manual
.
4.0
ADDRESS MAP
Table 6. Memory Signal Selections (RD1:0)
RD1:0
A17/P1.7
/CEX4/WCLK
A16/P3.7/RD#
PSEN#
WR#
Features
0 0
A17
A16
Asserted for
all addresses
Asserted for writes to
all memory locations
256-Kbyte external
memory
0 1
P1.7/CEX4/WCLK
A16
Asserted for
all addresses
Asserted for writes to
all memory locations
128-Kbyte external
memory
1 0
P1.7/CEX4/WCLK
P3.7 only
Asserted for
all addresses
Asserted for writes to
all memory locations
64-Kbyte external
memory
One additional port
pin
1 1
P1.7/CEX4/WCLK
RD# Asserted
for addresses
≤
7F:FFFFH
Asserted for
addresses
≥
80:0000H
Asserted for all com-
patible MCS 51 mem-
ory locations
Compatible with
MCS 51 microcon-
trollers
Table 7. 8x930AxAddress Map
Internal
Address
FF:FFFFH
FF:0000H
FE:FFFFH
FE:0000H
FD:FFFFH
02:0000H
01:FFFFH
01:0000H
00:FFFFH
00:0420H
00:041FH
00:0080H
00:007FH
00:0020H
00:001FH
00:0000H
NOTES:
1.
Eighteen address lines are bonded out (A15:0, A16:0, or A17:0 selected during chip configuration).
2.
Data in this area is accessible by indirect addressing only.
3.
Eight addresses at the top of all external memory maps are reserved for current and future device
configuration byte information.
4.
This reserved area returns unspecified values and writes no data.
5.
Data is accessible by direct and indirect addressing.
6.
Data is accessible by direct, indirect, and bit addressing.
7.
The special function registers (SFRs) and the register file have separate internal address spaces.
8.
Data is accessible by direct, indirect, and register addressing.
Description
Notes
External Memory: The last eight bytes of the external address range FF:XFF8H–
FF:XFFFH contain configuration byte information.
1, 2, 3
External Memory
2
Reserved Addresses
4
External Memory
2
External Memory
5
On-chip RAM
5
On-chip RAM
6
Storage for R0–R7 of Register File
7, 8
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