PIC16F636-E/ST Microchip Technology, PIC16F636-E/ST Datasheet - Page 121

• Manufacturer Part Number: PIC16F636-E/ST
• Description: IC MCU FLASH 2KX14 14TSSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F636-E/ST

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LVD, POR, WDT
• Number Of I /o: 11
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 14-TSSOP
• For Use With: AC162057 - MPLAB ICD 2 HEADER 14DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

FIGURE 11-17:
© 2007 Microchip Technology Inc.
LFDATA/RSSI/
MCU SPI Write Details:
1.
2.
3.
4.
5.
6.
7.
CCLK/SDIO
ALERT
SCLK/
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 Write sequence - command, address, data and parity bit.
•
Change LFDATA/RSSI/CCLK/SDIO connected pin to input.
Raise CS to complete the SPI Write.
Change SCLK/ALERT back to input.
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, data and parity bit.
(output)
ALERT
LFDATA
(output)
1
SPI WRITE SEQUENCE
(input)
2
SCLK
(input)
T
CSSC
SDI
T
3
SU
MSb
T
HD
4
16 Clocks for Write Command, Address and Data
PIC12F635/PIC16F636/639
T
HI
1/F
SCLK
T
LO
LSb
T
SCCS
5
6
T
LFDATA
(output)
CS
1
(output)
DS41232D-page 119
ALERT
T
7
CSH
T
CS
0