MA180025 Microchip Technology, MA180025 Datasheet - Page 165

• Manufacturer Part Number: MA180025
• Description: MODULE PLUG-IN PIC18F87J90 PIM
• Manufacturer: Microchip Technology
• Series: PIC®r

Specifications of MA180025

• Accessory Type: Plug-In Module (PIM) - PIC18F87J90
• Product: Microcontroller Modules
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18FxxJxx
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM LCD 2 Demonstration Board (DM163030)
• For Use With: DM163030 - KIT DEV PICDEM LCD2
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

15.1.4
An attempt to write to the RTCEN bit while
RTCWREN = 0 will be ignored. RTCWREN must be
set before a write to RTCEN can take place.
Like the RTCEN bit, the RTCVALH and RTCVALL
registers can only be written to when RTCWREN = 1.
A write to these registers, while RTCWREN = 0, will be
ignored.
FIGURE 15-2:
FIGURE 15-3:
 2010 Microchip Technology Inc.
RTCEN BIT WRITE
0-9
0-2
0-2
(24-hour format)
(24-hour format)
Hours
Hours
Year
TIMER DIGIT FORMAT
ALARM DIGIT FORMAT
0-9
0-9
0-9
0-5
0-1
0-5
0-1
Minutes
Minutes
Month
Month
0-9
0-9
0-9
0-9
PIC18F87J90 FAMILY
15.2
15.2.1
The register interface for the RTCC and alarm values is
implemented using the Binary Coded Decimal (BCD)
format. This simplifies the firmware when using the
module as each of the digits is contained within its own
4-bit value (see Figure 15-2 and Figure 15-3).
0-5
0-3
0-5
0-3
Seconds
Seconds
Operation
Day
Day
REGISTER INTERFACE
0-9
0-9
0-9
0-9
1/2 Second Bit
Day Of Week
(binary format)
Day Of Week
DS39933D-page 165
0-6
0-6
0/1