參數(shù)資料
型號(hào)： ISP1130N
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： Universal Serial Bus compound hub with integrated keyboard controller
中文描述： SPECIALTY MICROPROCESSOR CIRCUIT, PDIP56
封裝： PLASTIC, SDIP-56
文件頁(yè)數(shù)： 35/68頁(yè)
文件大?。?/td> 1786K
代理商： ISP1130N
Philips Semiconductors
ISP1130
USB compound hub with keyboard controller
Objective specification
Rev. 01 — 23 March 2000
35 of 68
9397 750 06895
Philips Electronics N.V. 2000. All rights reserved.
SFRs (80H to FFH)
: direct addressing
4 register banks (00H to 1FH)
: direct addressing; only 1 register bank may be
enabled at any time
Bit-addressable locations (20H to 2FH)
: direct addressing; these 16 bytes can
be used as 128 bit-addressable locations.
10.2.2
Program memory
The ISP1130 has 8 kbytes of masked ROM for storing the 80C51 operating software.
In order to protect the ROM against illegal copying, execution of a MOVC instruction
from external code memory has been blocked. Instead of reading the program
memory, it accesses the on-chip data memory.
10.3 Special function registers (SFRs)
The SFRs of the 80C51 can only be directly addressed. The memory map is given in
Table 47
.
Fig 5.
Data memory organization.
width
MGS799
FFH
INDIRECT
ADDRESSING
SFRs
DIRECT
ADDRESSING
ONLY
DIRECT &
INDIRECT
ADDRESSING
7FH
80H
20H
00H
4 BANKS OF R0 to R7
Data Memory Space
Fig 6.
Program memory organization.
handbook, halfpage
MGS800
1FFFH
8 kbytes
ON-CHIP
USER ROM
0000H
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