80C554 Datasheet, PDF (13/76 Pages) NXP Semiconductors – 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP

Philips Semiconductors
80C51 8-bit microcontroller – 6 clock operation
16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I²C, PWM,
capture/compare, high I/O, 64L LQFP
Preliminary specification
80C554/83C554/87C554
AUXR1
Address = A2H
Not Bit Addressable
Symbol
DPS
WUPD
GF2
SRST
AIDL
ADC8
ADC8 AIDL SRST
GF2 WUPD
0
—
Bit:
7
6
5
4
3
2
1
Function
Data Pointer Switch—switches between DPRT0 and DPTR1.
DPS
0
1
Operating Mode
DPTR0
DPTR1
Enable wakeup from powerdown.
General Purpose Flag—set and cleared by the user.
Software Reset
Enables the ADC during idle mode.
ADC Mode Switch—switches between 10-bit conversion and 8-bit conversion.
ADC8
0
1
Operating Mode
10-bit conversion (50 machine cycles)
8-bit conversion (24 machine cycles)
Reset Value = 0000 00x0B
DSP
0
NOTE:
*User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features. In that
case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate.
Figure 7. AUXR1: DPTR Control Register
SU01081
2000 Nov 10
13