PIC16F636-I/P Microchip Technology Inc., PIC16F636-I/P Datasheet - Page 104
PIC16F636-I/P
Manufacturer Part Number
PIC16F636-I/P
Description
14 PIN, 3.5 KB FLASH, 128 RAM, 12 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16F636-IP.pdf
(196 pages)
Specifications of PIC16F636-I/P
Comparators
2
Cpu Speed
5 MIPS
Eeprom Memory
256 Bytes
Input Output
12
Memory Type
Flash
Number Of Bits
8
Package Type
14-pin PDIP
Programmable Memory
3.5K Bytes
Ram Size
128 Bytes
Speed
20 MHz
Timers
1-8-bit, 1-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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PIC12F635/PIC16F636/639
FIGURE 11-18:
DS41232B-page 102
LFDATA/RSSI/
MCU SPI Read Details:
1.
2.
3.
4.
5.
6.
SCLK/ALERT
Note:
CCLK/SDIO
Drive the AFE’s open collector ALERT output low.
•
Drop CS
•
•
Change LFDATA/RSSI/CCLK/SDIO connected pin to output.
•
Clock in 16-bit SPI Read sequence.
•
Change LFDATA/RSSI/CCLK/SDIO connected pin to input.
Raise CS to complete the SPI Read entry of command and address.
CS
To ensure no false clocks occur when CS drops.
AFE SCLK/ALERT becomes SCLK input.
LFDATA/RSSI/CCLK/SDIO becomes SDI input.
Driving SPI data.
Command, address and dummy data.
(output)
ALERT
The T
Configuration register data appears at 6th clock after T
LFDATA
(output)
1
CSH
(input)
(input)
SCLK
SDI
T
2
CSSC
is considered as one clock. Therefore, the
SPI READ SEQUENCE
T
SU
MSb
T
3
HD
4
16 Clocks for Read Command,
Address and Dummy Data
T
1/F
HI
SCLK
T
LO
Preliminary
CSH
LSb
.
T
SCCS
6
5
7.
8.
9.
10.
T
LFDATA
(output)
CS
(output)
ALERT
1
T
Drop CS.
•
•
Clock out 16-bit SPI Read result.
•
•
•
Raise CS to complete the SPI Read.
Change SCLK/ALERT back to input.
CSH
T
CS
AFE SCLK/ALERT becomes SCLK input.
LFDATA/RSSI/CCLK/SDIO becomes SDO output.
First seven bits clocked-out are dummy bits.
Next eight bits are the Configuration register data.
The last bit is the Configuration register row parity bit.
0
(input)
(output)
SCLK
T
SDO
7
CSSC
8
16 Clocks for Read Result
© 2005 Microchip Technology Inc.
T
DO
T
CSSC
9
T
LFDATA
(output)
CS
(output)
1
ALERT
10
T
CSH
T
CS
0
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