PIC18F85K22-I/PT Microchip Technology, PIC18F85K22-I/PT Datasheet - Page 320

• Manufacturer Part Number: PIC18F85K22-I/PT
• Description: IC, 8BIT MCU, PIC18F, 64MHZ, TQFP-80
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F85K22-I/PT

• Controller Family/series: PIC18
• No. Of I/o's: 69
• Eeprom Memory Size: 1KB
• Ram Memory Size: 2KB
• Cpu Speed: 64MHz
• No. Of Timers: 8
• Core Size: 8 Bit
• Program Memory Size: 32KB
• Core Processor: PIC
• Speed: 64MHz
• Connectivity: EBI/EMI, I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 24x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Following this, the ACKEN bit is automatically cleared, the
PIC18F87K22 FAMILY
21.4.12
An Acknowledge sequence is enabled by setting the
Acknowledge
(SSPxCON2<4>). When this bit is set, the SCLx pin is
pulled low and the contents of the Acknowledge data bit
are presented on the SDAx pin. If the user wishes to gen-
erate an Acknowledge, then the ACKDT bit should be
cleared. If not, the user should set the ACKDT bit before
starting an Acknowledge sequence. The Baud Rate Gen-
erator then counts for one rollover period (T
SCLx pin is deasserted (pulled high). When the SCLx pin
is sampled high (clock arbitration), the Baud Rate Gener-
ator counts for T
Baud Rate Generator is turned off and the MSSP module
then goes into an inactive state
21.4.12.1
If the user writes the SSPxBUF when an Acknowledge
sequence is in progress, then WCOL is set and the
contents of the buffer are unchanged (the write doesn’t
occur).
FIGURE 21-25:
FIGURE 21-26:
DS39960D-page 320
ACKNOWLEDGE SEQUENCE
TIMING
WCOL Status Flag
SCLx
SDAx
Note: T
Sequence
SSPxIF
Note: T
BRG
SDAx
Write to SSPxCON2,
SCLx
Falling Edge of
9th Clock
; the SCLx pin is then pulled low.
BRG
Acknowledge Sequence Starts Here,
ACKNOWLEDGE SEQUENCE WAVEFORM
STOP CONDITION RECEIVE OR TRANSMIT MODE
BRG
= one Baud Rate Generator period.
ACK
SSPxIF Set at
the End of Receive
= one Baud Rate Generator period.
Set PEN
Enable
(Figure
ACKEN = 1, ACKDT = 0
Write to SSPxCON2,
21-25).
bit,
T
T
BRG
BRG
BRG
SDAx Asserted Low Before Rising Edge of Clock
to Set up Stop Condition
8
D0
) and the
ACKEN
T
SCLx Brought High After T
BRG
Cleared in
Software
T
BRG
P
SCLx = 1 for T
after SDAx Sampled High. P bit (SSPxSTAT<4>) is Set
T
ACK
BRG
21.4.13
A Stop bit is asserted on the SDAx pin at the end of a
receive/transmit by setting the Stop Sequence Enable
bit, PEN (SSPxCON2<2>). At the end of a
receive/transmit, the SCLx line is held low after the
falling edge of the ninth clock. When the PEN bit is set,
the master will assert the SDAx line low. When the
SDAx line is sampled low, the Baud Rate Generator is
reloaded and counts down to 0. When the Baud Rate
Generator times out, the SCLx pin will be brought high
and one T
later, the SDAx pin will be deasserted. When the SDAx
pin is sampled high while SCLx is high, the P bit
(SSPxSTAT<4>) is set. A T
cleared and the SSPxIF bit is set (see
21.4.13.1
If the user writes the SSPxBUF when a Stop sequence
is in progress, then the WCOL bit is set and the
contents of the buffer are unchanged (the write doesn’t
occur).
T
BRG
PEN bit (SSPxCON2<2>) is Cleared by
9
SSPxIF Set at the End
of Acknowledge Sequence
Hardware and the SSPxIF bit is Set
BRG
BRG
BRG
, Followed by SDAx = 1 for T
STOP CONDITION TIMING
WCOL Status Flag
ACKEN Automatically Cleared
(Baud Rate Generator rollover count)
 2009-2011 Microchip Technology Inc.
Cleared in
Software
BRG
later, the PEN bit is
BRG
Figure
21-26).