P89LPC980 NXP [NXP Semiconductors], P89LPC980 Datasheet - Page 22

• Manufacturer Part Number: P89LPC980
• Description: 8-bit microcontroller with accelerated two-clock 80C51 core, 4 kB/8 kB wide-voltage byte-erasable flash with 10-bit ADC
• Manufacturer: NXP [NXP Semiconductors]

Table 5.
[1]
[2]
[3]
Name
CMPREF
RTCDATH Real-time clock
RTCDATL Real-time clock
Extended SFRs are physically located on-chip but logically located in external data memory address space (XDATA). The MOVX A,@DPTR and MOVX @DPTR,A instructions are
used to access these extended SFRs.
The BOICFG2/1/0 will be copied from UCFG1.5 to UCFG1.3 when power-on reset.
CLKCON register reset value comes from UCFG1. The reset value of CLKCON.2 to CLKCON.0 come from UCFG1.2 to UCFG1.0 and reset value of CLKDBL bit comes from
UCFG1.7.
Extended special function registers - P89LPC980/982
Description
Comparator
reference
register
data register
high
data register low
SFR
addr.
FFCBH
FFBEH
FFBFH
Bit functions and addresses
MSB
-
REFS5
REFS4
[1]
…continued
REFS3
-
REFS2
REFS1
REFS0
LSB
Reset value
Hex
00
00
00
Binary
0000 0000
0000 0000
0000 0000