参数资料
型号: P83C557E4
厂商: NXP Semiconductors N.V.
英文描述: Single-chip 8-bit microcontroller(单片8位微控制器)
中文描述: 单芯片8位微控制器(单片8位微控制器)
文件页数: 10/72页
文件大小: 525K
代理商: P83C557E4
Philips Semiconductors
Product specification
P83C557E4/P80C557E4/P89C557E4
Single-chip 8-bit microcontroller
1999 Mar 02
10
MOVX @DPTR,A
MOVX A,@DPTR
MOVX A, @Ri
MOVX @Ri, A
255
255
0
255
0
0
767
(XRAMP) = 02 H
(XRAMP) = 01 H
(XRAMP) = 00 H
0
Figure 5. Indirect addressing of AUX-RAM (768 Bytes), ARD bit in PCON = 0
512
511
256
255
6.2.2.1
The AUX-RAM Page Register is used to select one of three 256
bytes pages of the internal 768 bytes AUX-RAM for
MOVX-accesses via R0 or R1. Its reset value is (XXXXXX00).
AUX-RAM Page Register XRAMP
7
6
5
4
3
2
1
0
x
x
x
x
x
x
XRAMP1
XRAMP0
XRAMP (FAH)
Figure 6. AUX-RAM page register.
x: undefined during read, a write operation must write “0” to these locations
Table 3.
Description of XRAMP Bits
BIT
SYMBOL
FUNCTION
XRAMP.2–7
XRAMP.1
XRAMP.0
XRAMPx
XRAMP1
XRAMP0
reserved for future use
AUX-RAM page select bit 1
AUX-RAM page select bit 0
Table 4.
Memory Locations for All Possible MOVX Accesses
ARD
1
XRAMP1
XRAMP0
MOVX @Ri,A and MOVX A,@Ri instructions access:
0
0
0
AUX-RAM locations 0 .. 255 (reset condition)
0
0
1
AUX-RAM locations 256 .. 511
0
1
0
AUX-RAM locations 512 .. 767
0
1
1
no valid memory access; reserved for future use
1
X
X
External RAM locations 0 .. 255
MOVX @DPTR,A and MOVX A,@DPTR instructions access:
0
X
X
AUX-RAM locations 0 .. 767 (reset condition)
External RAM locations 768 .. 65535
1
X
X
External RAM locations 0 .. 65535
NOTE:
1. ARD (AUX-RAM Disable) is a bit in the Special Function Register PCON
相关PDF资料
PDF描述
P80C557E4 Single-chip 8-bit microcontroller(单片8位微控制器)
P89C557E6 Single-chip 8-bit microcontroller(单片8位微控制器)
P80C557E6 Single-chip 8-bit microcontroller(单片8位微控制器)
P89C58 80C51 8-bit microcontroller family 4K/8K/16K/32K Flash
P89C54X2 80C51 8-bit Flash microcontroller family
相关代理商/技术参数
参数描述
P83C557E4EBB 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Single-chip 8-bit microcontroller
P83C557E4EBB/YYY 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
P83C557E4EFB 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Single-chip 8-bit microcontroller
P83C557E4EFB/YYY 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
P83C557E6 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Single-chip 8-bit microcontroller