PIC17LC752-08I/PT Microchip Technology, PIC17LC752-08I/PT Datasheet - Page 159
![IC MCU OTP 8KX16 A/D 64TQFP](/photos/6/81/68123/c04-066_pf_sml.jpg)
PIC17LC752-08I/PT
Manufacturer Part Number
PIC17LC752-08I/PT
Description
IC MCU OTP 8KX16 A/D 64TQFP
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Specifications of PIC17LC752-08I/PT
Core Processor
PIC
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
50
Program Memory Size
16KB (8K x 16)
Program Memory Type
OTP
Ram Size
678 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TFQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
PIC17LC752-08I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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15.2.11
Transmission of a data byte, a 7-bit address, or either
half of a 10-bit address, is accomplished by simply writ-
ing a value to SSPBUF register. This action will set the
buffer full flag (BF) and allow the baud rate generator to
begin counting and start the next transmission. Each bit
of address/data will be shifted out onto the SDA pin
after the falling edge of SCL is asserted (see data hold
time spec). SCL is held low for one baud rate generator
roll over count (T
is released high (see Data setup time spec). When the
SCL pin is released high, it is held that way for T
the data on the SDA pin must remain stable for that
duration and some hold time after the next falling edge
of SCL. After the eighth bit is shifted out (the falling
edge of the eighth clock), the BF flag is cleared and the
master releases SDA, allowing the slave device being
addressed to respond with an ACK bit during the ninth
bit time, if an address match occurs or if data was
received properly. The status of ACK is read into the
ACKDT on the falling edge of the ninth clock. If the
master receives an acknowledge, the acknowledge
status bit (AKSTAT) is cleared. If not, the bit is set. After
the ninth clock, the SSPIF is set and the master clock
(baud rate generator) is suspended until the next data
byte is loaded into the SSPBUF, leaving SCL low and
SDA unchanged (Figure 15-26).
After the write to the SSPBUF, each bit of address will
be shifted out on the falling edge of SCL until all seven
address bits and the R/W bit are completed. On the fall-
ing edge of the eighth clock, the master will de-assert
the SDA pin, allowing the slave to respond with an
acknowledge. On the falling edge of the ninth clock, the
master will sample the SDA pin to see if the address
was recognized by a slave. The status of the ACK bit is
loaded into the ACKSTAT status bit (SSPCON2<6>).
Following the falling edge of the ninth clock transmis-
sion of the address, the SSPIF is set, the BF flag is
cleared and the baud rate generator is turned off until
another write to the SSPBUF takes place, holding SCL
low and allowing SDA to float.
2000 Microchip Technology Inc.
I
TRANSMISSION
2
C MASTER MODE
BRG
). Data should be valid before SCL
BRG
,
15.2.11.1
In Transmit mode, the BF bit (SSPSTAT<0>) is set
when the CPU writes to SSPBUF and is cleared when
all 8 bits are shifted out.
15.2.11.2
If the user writes the SSPBUF when a transmit is
already in progress (i.e., SSPSR is still shifting out a
data byte), then WCOL is set and the contents of the
buffer are unchanged (the write doesn’t occur).
WCOL must be cleared in software.
15.2.11.3
In Transmit mode, the AKSTAT bit (SSPCON2<6>) is
cleared when the slave has sent an acknowledge (ACK
= 0) and is set when the slave does not acknowledge
(ACK = 1). A slave sends an acknowledge when it has
recognized its address (including a general call), or
when the slave has properly received its data.
BF Status Flag
WCOL Status Flag
AKSTAT Status Flag
PIC17C7XX
DS30289B-page 159
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