PIC18F87K90-E/PT Microchip Technology, PIC18F87K90-E/PT Datasheet - Page 221

• Manufacturer Part Number: PIC18F87K90-E/PT
• Description: 128kB Flash, 4kB RAM, 1kB EE, 16MIPS, NanoWatt XLP, LCD, 5V 80 TQFP 12x12x1mm TR
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F87K90-E/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 24x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 80-TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

REGISTER 17-4:
 2009-2011 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5-2
bit 1-0
ALRMEN
R/W-0
ALRMEN: Alarm Enable bit
1 = Alarm is enabled (cleared automatically after an alarm event whenever ALRMPTR<1:0> = 00
0 = Alarm is disabled
CHIME: Chime Enable bit
1 = Chime is enabled; ALRMPTR<1:0> bits are allowed to roll over from 00h to FFh
0 = Chime is disabled; ALRMPTR<1:0> bits stop once they reach 00h
AMASK<3:0>: Alarm Mask Configuration bits
0000 = Every half second
0001 = Every second
0010 = Every 10 seconds
0011 = Every minute
0100 = Every 10 minutes
0101 = Every hour
0110 = Once a day
0111 = Once a week
1000 = Once a month
1001 = Once a year (except when configured for February 29
101x = Reserved – Do not use
11xx = Reserved – Do not use
ALRMPTR<1:0>: Alarm Value Register Window Pointer bits
Points to the corresponding Alarm Value registers when reading the ALRMVALH and ALRMVALL
registers. The ALRMPTR<1:0> value decrements on every read or write of ALRMVALH until it reaches
‘00’.
ALRMVALH:
00 = ALRMMIN
01 = ALRMWD
10 = ALRMMNTH
11 = Unimplemented
ALRMVALL:
00 = ALRMSEC
01 = ALRMHR
10 = ALRMDAY
11 = Unimplemented
CHIME
R/W-0
and CHIME = 0)
ALRMCFG: ALARM CONFIGURATION REGISTER
W = Writable bit
‘1’ = Bit is set
AMASK3
R/W-0
AMASK2
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
PIC18F87K90 FAMILY
AMASK1
R/W-0
AMASK0
R/W-0
th
, once every four years)
x = Bit is unknown
ALRMPTR1
R/W-0
DS39957D-page 221
ALRMPTR0
R/W-0
bit 0