PIC16C770-I/SO Microchip Technology, PIC16C770-I/SO Datasheet - Page 86

• Manufacturer Part Number: PIC16C770-I/SO
• Description: IC MCU OTP 2KX14 A/D PWM 20-SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C770-I/SO

• Core Size: 8-Bit
• Program Memory Size: 3.5KB (2K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI
• Number Of I /o: 15
• Program Memory Type: OTP
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 6x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Controller Family/series: PIC16C
• No. Of I/o's: 16
• Ram Memory Size: 256Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGAC164028 - MODULE SKT PROMATEII 20SOIC/DIP309-1013 - ADAPTER 20-SOIC TO 20-DIP309-1012 - ADAPTER 20-SOIC TO 20-DIP
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: PIC16C770I/SO

PIC16C717/770/771
9.2.7
In Multi-Master mode, the interrupt generation on the
detection of the START and STOP conditions allows
the determination of when the bus is free. The STOP
(P) and START (S) bits are cleared from a RESET or
when the MSSP module is disabled. Control of the I
bus may be taken when bit P (SSPSTAT<4>) is set, or
the bus is idle with both the S and P bits clear. When
the bus is busy, enabling the SSP Interrupt will gener-
ate the interrupt when the STOP condition occurs.
In multi-master operation, the SDA line must be moni-
tored for arbitration to see if the signal level is the
expected output level. This check is performed in hard-
ware, with the result placed in the BCLIF bit.
The states where arbitration can be lost are:
• Address Transfer
• Data Transfer
• A START Condition
• A Repeated START Condition
• An Acknowledge Condition
Refer to Application Note AN578, "Use of the SSP
Module in the I
9.2.8
Master mode is enabled by setting and clearing the
appropriate SSPM bits in SSPCON and by setting the
SSPEN bit. Once Master mode is enabled, the user
has six options.
1.
2.
3.
4.
5.
6.
The master device generates all serial clock pulses and
the START and STOP conditions. A transfer is ended
with a STOP condition or with a Repeated START con-
dition. Since the Repeated START condition is also the
beginning of the next serial transfer, the I
be released.
DS41120B-page 84
Note:
Assert a START condition on SDA and SCL.
Assert a Repeated START condition on SDA
and SCL.
Write to the SSPBUF register initiating transmis-
sion of data/address.
Generate a STOP condition on SDA and SCL.
Configure the I
Generate an Acknowledge condition at the end
of a received byte of data.
The MSSP Module, when configured in I
Master mode, does not allow queueing of
events. For instance, the user is not
allowed to initiate a START condition and
immediately write the SSPBUF register to
initiate transmission before the START
condition is complete. In this case, the
SSPBUF will not be written to, and the
WCOL bit will be set, indicating that a write
to the SSPBUF did not occur.
MULTI-MASTER OPERATION
I
2
C MASTER OPERATION
2
C™ Multi-Master Environment."
2
C port to receive data.
2
C bus will not
Advance Information
2
2
C
C
9.2.9
The baud rate generator used for SPI mode operation
is used in the I
quency. Standard SCL clock frequencies are 100 kHz,
400 kHz, and 1 MHz. One of these frequencies can be
achieved by setting the SSPADD register to the appro-
priate number for the selected Fosc frequency. One
half of the SCL period is equal to
[(SSPADD+1) 2]/Fosc.
The baud rate generator reload value is contained in
the lower seven bits of the SSPADD register (Figure 9-
14). When the BRG is loaded with this value, the BRG
counts down to 0 and stops until another reload occurs.
The BRG count is decremented twice per instruction
cycle (T
In I
provided that the SCL line is sampled high. For exam-
ple, if Clock Arbitration is taking place, the BRG reload
will be suppressed until the SCL line is released by the
slave allowing the pin to float high (Figure 9-15).
FIGURE 9-14:
2
SSPM<3:0>
C Master mode, the BRG is reloaded automatically
SSPM<3:0>
CY
BRG CLKOUT
) on the Q2 and Q4 clock.
SCL
BAUD RATE GENERATOR
2
C Master mode to set the SCL clock fre-
BAUD RATE GENERATOR
BLOCK DIAGRAM
Control
Reload
2002 Microchip Technology Inc.
BRG Down Counter
SSPADD<6:0>
Reload
Fosc/2