PIC18C242/JW Microchip Technology, PIC18C242/JW Datasheet - Page 8

• Manufacturer Part Number: PIC18C242/JW
• Description: IC MCU EPROM 8KX16 A/D 28CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Cr

Specifications of PIC18C242/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: EPROM, UV
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-CDIP (0.300", 7.62mm) Window
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

PIC18CXX2
5. Module: Interrupts
REGISTER 21-3:
FIGURE 1:
DS80058H-page 8
The operation of the GIE/GIEH bit (INTCON<7>) is
clarified as follows: when the bit is cleared, all
interrupts are disabled. This is regardless of the
state of the IPEN bit (RCON<7>), the priority of the
interrupt, or whether or not the interrupt is
unmasked. This varies from the original descrip-
tion, in which clearing the bit when IPEN = ’1’
would only disable high priority interrupts.
The seventh paragraph in Section 7.0 of the
Device Data Sheet (beginning “When an interrupt
is responded to....”) is amended by adding the fol-
lowing sentence to the end:
Low Priority Interrupt Generation
Peripheral Interrupt Enable bit
Peripheral Interrupt Priority bit
Peripheral Interrupt Flag bit
bit 7
TMR1IE
TMR1IP
TMR1IF
XXXXIF
XXXXIE
XXXXIP
INTERRUPT LOGIC (EXCERPT)
INTCON REGISTER (EXCERPT)
GIE/GIEH: Global Interrupt Enable bit
When IPEN (RCON<7>) = 0:
1 = Enables all unmasked interrupts
0 = Disables all interrupts
When IPEN (RCON<7>) = 1:
1 = Enables all high priority interrupts
0 = Disables all interrupts
Additional Peripheral Interrupts
TMR0IE
TMR0IP
TMR0IF
INT1IF
INT1IE
INT1IP
INT2IF
INT2IE
INT2IP
RBIF
RBIE
RBIP
“It is important to note, however, that clearing the
GIE/GIEH bit, regardless of the state of the IPEN
bit, will disable all interrupts.”
The changes to the bit descriptions in Register 7-1
in the Device Data Sheet are shown in the excerpt
below (changes in bold).
Also, the interrupt logic funnel shown in Figure 7-1
of the Device Data Sheet is amended with the
addition of a GIE/GIEH control line, as shown in
Figure 1 (new material in bold line).
 2002 Microchip Technology Inc.
GIEL/PEIE
GIE/GEIH
Interrupt to CPU
Vector to Location
0018h