PIC18F86J90T-I/PT Microchip Technology, PIC18F86J90T-I/PT Datasheet - Page 226

• Manufacturer Part Number: PIC18F86J90T-I/PT
• Description: Segmented LCD, 96KB Flash, 4KB RAM, 12 MIPS, NanoWatt 80 TQFP 12x12x1mm T/R
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F86J90T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 67
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3923 B
• Interface Type: AUSART, EUSART, I2C, SPI
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 67
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162079 - HEADER MPLAB ICD2 18F85J90 64/80AC164328 - MODULE SKT FOR 80TQFP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

PIC18F87J90 FAMILY
18.4.3.2
Masking an address bit causes that bit to become a
“don’t care”. When one address bit is masked, two
addresses will be Acknowledged and cause an
interrupt. It is possible to mask more than one address
bit at a time, which makes it possible to Acknowledge
up to 31 addresses in 7-bit mode and up to
63 addresses in 10-bit mode (see Example 18-2).
The I
masking is used or not. However, when address
masking is used, the I
multiple addresses and cause interrupts. When this
occurs, it is necessary to determine which address
caused the interrupt by checking SSPBUF.
In 7-Bit Addressing mode, address mask bits,
ADMSK<5:1> (SSPCON<5:1>), mask the correspond-
ing address bits in the SSPADD register. For any ADMSK
bits that are set (ADMSK<n> = 1), the corresponding
address bit is ignored (SSPADD<n> = x). For the module
to issue an address Acknowledge, it is sufficient to match
only on addresses that do not have an active address
mask.
EXAMPLE 18-2:
DS39933D-page 226
7-Bit Addressing:
10-Bit Addressing:
2
C slave behaves the same way, whether address
SSPADD<7:1> = A0h (1010000) (SSPADD<0> is assumed to be ‘0’)
ADMSK<5:1>
Addresses Acknowledged: A0h, A2h, A4h, A6h, A8h, AAh, ACh, AEh
SSPADD<7:0> = A0h (10100000) (the two MSbs of the address are ignored in this example, since they are
not affected by masking)
ADMSK<5:1>
Addresses Acknowledged: A0h, A1h, A2h, A3h, A4h, A5h, A6h, A7h, A8h, A9h, AAh, ABh, ACh, ADh, AEh, AFh
Address Masking
ADDRESS MASKING EXAMPLES
= 00111
= 00111
2
C slave can Acknowledge
In 10-Bit Addressing mode, the ADMSK<5:2> bits
mask the corresponding address bits in the SSPADD
register. In addition, ADMSK1 simultaneously masks
the two LSbs of the address (SSPADD<1:0>). For any
ADMSK bits that are active (ADMSK<n> = 1), the cor-
responding address bit is ignored (SSPADD<n> = x).
Also note, that although in 10-Bit Addressing mode, the
upper address bits reuse part of the SSPADD register
bits. The address mask bits do not interact with those
bits. They only affect the lower address bits.
Note 1: ADMSK1 masks the two Least Significant
2: The two Most Significant bits of the
bits of the address.
address are not affected by address
masking.
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