PIC16F636-I/ST Microchip Technology, PIC16F636-I/ST Datasheet - Page 95

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

Specifications of PIC16F636-I/ST

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 14-TSSOP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LVD, POR, WDT
• Number Of I /o: 11
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: RS- 232/SPI/USB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Package: 14TSSOP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162057 - MPLAB ICD 2 HEADER 14DIP
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

11.29 Demodulator
The demodulator recovers the modulation data from
the received signal, containing carrier plus data, by
appropriate envelope detection. The demodulator has
a fast rise (charge) time (T
appropriate to an envelope of input signal (see
Section 15.0 “Electrical Specifications” for T
and T
the full-wave rectifier, low-pass filter, peak detector
and data slicer.
FIGURE 11-9:
11.30 Power-On Reset
This circuit remains in a Reset state until a sufficient
supply voltage is applied to the AFE. The Reset
releases when the supply is sufficient for correct AFE
operation, nominally
The Configuration registers are all cleared on a Power-
on Reset. As the Configuration registers are protected
by odd row and column parity, the ALERT pin will be
pulled down – indicating to the microcontroller section
that the AFE configuration memory is cleared and
requires loading.
11.31 LFDATA Output Selection
The LFDATA output can be configured to pass the
Demodulator output, Received Signal Strength Indicator
(RSSI) output, or Carrier Clock. See Configuration
Register 1 (Register 11-2) for more details.
11.31.1
The demodulator output is the default configuration of
the output selection. This is the output of an envelope
detection circuit. See Figure 11-9 for the demodulator
output.
© 2005 Microchip Technology Inc.
DF
Full-wave Rectifier output
specifications). The demodulator contains
DEMODULATOR OUTPUT
Signal into LC input pins
(demodulator output)
Data Slicer output
V
POR
DEMODULATOR CHARGE AND DISCHARGE
of AFE.
DR
) and a fall time (T
T
PIC12F635/PIC16F636/639
DR
Preliminary
DF
DR
)
For a clean data output or to save operating power, the
input channels can be individually enabled or disabled. If
more than one channel is enabled, the output is the sum
of each output of all enabled channels. There will be no
valid output if all three channels are disabled. When the
demodulated output is selected, the output is available in
two different conditions depending on how the options of
Configuration Register 0 (Register 11-1) are set: Output
Enable Filter is disabled or enabled.
Related Configuration register bits:
• Configuration Register 1 (Register 11-2),
• Configuration Register 0 (Register 11-1): all bits
DATOUT <8:7>:
- bit 8 bit 7
T
DF
0
0
1
0
0: Demodulator Output
1: Carrier Clock Output
0: RSSI Output
1: RSSI Output
DS41232B-page 93