P8XC557E4 NXP Semiconductors, P8XC557E4 Datasheet - Page 10
![The P80C557E4/P83C557E4/P89C557E4 (hereafter generically referred to as P8xC557E4) single-chip 8-bit microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family](/photos/41/53/415310/sot318-2_3d_sml.gif)
P8XC557E4
Manufacturer Part Number
P8XC557E4
Description
The P80C557E4/P83C557E4/P89C557E4 (hereafter generically referred to as P8xC557E4) single-chip 8-bit microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family
Manufacturer
NXP Semiconductors
Datasheet
1.P8XC557E4.pdf
(72 pages)
- Current page: 10 of 72
- Download datasheet (375Kb)
1. ARD (AUX-RAM Disable) is a bit in the Special Function Register PCON
Philips Semiconductors
6.2.2.1 AUX-RAM Page Register XRAMP
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).
Table 3. Description of XRAMP Bits
Table 4. Memory Locations for All Possible MOVX Accesses
NOTE:
1999 Mar 02
BIT
XRAMP.2–7
XRAMP.1
XRAMP.0
0
0
0
0
1
0
1
ARD
Single-chip 8-bit microcontroller
1
XRAMP (FAH)
x: undefined during read, a write operation must write “0” to these locations
SYMBOL
XRAMPx
XRAMP1
XRAMP0
XRAMP1
0
0
1
1
X
X
X
MOVX @Ri, A
MOVX A, @Ri
Figure 5. Indirect addressing of AUX-RAM (768 Bytes), ARD bit in PCON = 0
FUNCTION
reserved for future use
AUX-RAM page select bit 1
AUX-RAM page select bit 0
7
x
XRAMP0
0
1
0
1
X
X
X
255
255
255
0
0
0
6
x
Figure 6. AUX-RAM page register.
(XRAMP) = 02 H
(XRAMP) = 01 H
(XRAMP) = 00 H
5
x
MOVX @Ri,A and MOVX A,@Ri instructions access:
AUX-RAM
AUX-RAM
AUX-RAM
no valid memory access; reserved for future use
External RAM locations
MOVX @DPTR,A and MOVX A,@DPTR instructions access:
AUX-RAM
External RAM locations 768 .. 65535
External RAM locations
10
4
x
P83C557E4/P80C557E4/P89C557E4
locations
locations 256 .. 511
locations 512 .. 767
locations
x
3
767
256
255
512
511
0 .. 255 (reset condition)
0 .. 767 (reset condition)
0
0 .. 255
0 .. 65535
MOVX @DPTR,A
MOVX A,@DPTR
2
x
XRAMP1
1
Product specification
XRAMP0
0
Related parts for P8XC557E4
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![LPC2420_60](/images/manufacturer_photos/0/4/487/nxp_semiconductors_tmb.jpg)
Part Number:
Description:
NXP Semiconductors designed the LPC2420/2460 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
![LPC2458](/photos/41/52/415299/sot570-3_3d_tmb.gif)
Part Number:
Description:
NXP Semiconductors designed the LPC2458 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
![LPC2468](/images/manufacturer_photos/0/4/487/nxp_semiconductors_tmb.jpg)
Part Number:
Description:
NXP Semiconductors designed the LPC2468 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
![LPC2470](/images/manufacturer_photos/0/4/487/nxp_semiconductors_tmb.jpg)
Part Number:
Description:
NXP Semiconductors designed the LPC2470 microcontroller, powered by theARM7TDMI-S core, to be a highly integrated microcontroller for a wide range ofapplications that require advanced communications and high quality graphic displays
Manufacturer:
NXP Semiconductors
Datasheet:
![LPC2478](/images/manufacturer_photos/0/4/487/nxp_semiconductors_tmb.jpg)
Part Number:
Description:
NXP Semiconductors designed the LPC2478 microcontroller, powered by theARM7TDMI-S core, to be a highly integrated microcontroller for a wide range ofapplications that require advanced communications and high quality graphic displays
Manufacturer:
NXP Semiconductors
Datasheet:
![XA-G30](/images/manufacturer_photos/0/4/487/nxp_semiconductors_tmb.jpg)
Part Number:
Description:
The Philips Semiconductors XA (eXtended Architecture) family of 16-bit single-chip microcontrollers is powerful enough to easily handle the requirements of high performance embedded applications, yet inexpensive enough to compete in the market for hi
Manufacturer:
NXP Semiconductors
Datasheet:
![XA-G37](/photos/41/52/415289/sot187-2_3d_tmb.gif)
Part Number:
Description:
The Philips Semiconductors XA (eXtended Architecture) family of 16-bit single-chip microcontrollers is powerful enough to easily handle the requirements of high performance embedded applications, yet inexpensive enough to compete in the market for hi
Manufacturer:
NXP Semiconductors
Datasheet:
![XA-S3](/images/manufacturer_photos/0/4/487/nxp_semiconductors_tmb.jpg)
Part Number:
Description:
The XA-S3 device is a member of Philips Semiconductors? XA(eXtended Architecture) family of high performance 16-bitsingle-chip microcontrollers
Manufacturer:
NXP Semiconductors
Datasheet:
![LH75401_LH75411_N](/photos/41/52/415297/sot486-1_3d_tmb.gif)
Part Number:
Description:
The NXP BlueStreak LH75401/LH75411 family consists of two low-cost 16/32-bit System-on-Chip (SoC) devices
Manufacturer:
NXP Semiconductors
Datasheet:
![LPC3130_3131](/photos/41/52/415299/sot570-3_3d_tmb.gif)
Part Number:
Description:
The NXP LPC3130/3131 combine an 180 MHz ARM926EJ-S CPU core, high-speed USB2
Manufacturer:
NXP Semiconductors
Datasheet:
![LPC3141FET180](/photos/41/52/415299/sot570-3_3d_tmb.gif)
Part Number:
Description:
The NXP LPC3141 combine a 270 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
![LPC3143FET180](/photos/41/52/415299/sot570-3_3d_tmb.gif)
Part Number:
Description:
The NXP LPC3143 combine a 270 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
![LPC3152FET208](/photos/41/53/415307/sot930-1_3d_tmb.gif)
Part Number:
Description:
The NXP LPC3152 combines an 180 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
![LPC3154FET208](/photos/41/53/415307/sot930-1_3d_tmb.gif)
Part Number:
Description:
The NXP LPC3154 combines an 180 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
![BUK714R1-40BT](/photos/41/53/415317/sot426_3d_tmb.gif)
Part Number:
Description:
Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using NXP High-Performance Automotive (HPA) TrenchMOS technology
Manufacturer:
NXP Semiconductors
Datasheet: