PIC12F635-E/P Microchip Technology, PIC12F635-E/P Datasheet - Page 109
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PIC12F635-E/P
Manufacturer Part Number
PIC12F635-E/P
Description
IC MCU FLASH 1KX14 8DIP
Manufacturer
Microchip Technology
Series
PIC® 12Fr
Specifications of PIC12F635-E/P
Core Size
8-Bit
Program Memory Size
1.75KB (1K x 14)
Core Processor
PIC
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
5
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
8-DIP (0.300", 7.62mm)
Controller Family/series
PIC12
No. Of I/o's
6
Eeprom Memory Size
128Byte
Ram Memory Size
64Byte
Cpu Speed
20MHz
No. Of Timers
2
Processor Series
PIC12F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
64 B
Interface Type
RS- 232, SPI, USB
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
6
Number Of Timers
2
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DV164120, DM163029, DV164101, DM163014
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DM163029 - BOARD PICDEM FOR MECHATRONICSAC162057 - MPLAB ICD 2 HEADER 14DIPACICE0201 - MPLABICE 8P 300 MIL ADAPTER
Data Converters
-
Connectivity
-
Lead Free Status / Rohs Status
Details
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- Download datasheet (4Mb)
11.20 Soft Reset
The AFE issues a Soft Reset in the following events:
a)
b)
c)
d)
The “Abort” occurs if there is no positive signal
detected at the end of the AGC stabilization period
(T
brings the AFE into a low current Standby mode
operation. The internal circuits that are initialized by the
Soft Reset include:
• Output Enable Filter
• AGC circuits
• Demodulator
• 32 kHz Internal Oscillator
The Soft Reset has no effect on the Configuration register
setup, except for some of the AFE Status Register 7 bits.
(Register 11-8).
The circuit initialization takes one internal clock cycle
(1/32 kHz = 31.25
modulation transistors between each input and
LCCOM pins are turned-on to discharge any inter-
nal/external parasitic charges. The modulation transis-
tors are turned-off immediately after the initialization
time.
The Soft Reset is executed in Active mode only. It is not
valid in Standby mode.
11.21 Minimum Modulation Depth
The AFE demodulates the modulated input signal if the
modulation depth of the input signal is greater than the
minimum requirement that is programmed in the AFE
Configuration Register 5 (Register 11-6). Figure 11-7
shows the definition of the modulation depth and
examples. MODMIN<6:5> of the Configuration Register
5 offer four options. They are 75%, 50%, 25% and 12%,
with a default setting of 50%.
The purpose of this feature is to enhance the
demodulation integrity of the input signal. The 12%
setting is the best choice for the input signal with weak
modulation depth, which is typically observed near the
high-voltage base station antenna and also at
far-distance from the base station antenna. It gives the
best demodulation sensitivity, but is very susceptible to
noise spikes that can result in a bit detection error. The
75% setting can reduce the bit errors caused by noise,
but gives the least demodulation sensitivity. See
Table 11-3 for minimum modulation depth requirement
settings.
© 2007 Microchip Technology Inc.
AGC
After Power-on Reset (POR),
After Inactivity timer time-out,
If an “Abort” occurs,
After receiving SPI Soft Reset command.
). The Soft Reset initializes internal circuits and
Requirement for Input Signal
s). During the initialization, the
PIC12F635/PIC16F636/639
TABLE 11-3:
(Config. Register 5)
Bit 6
MODMIN Bits
0
0
1
1
Bit 5
SETTING FOR MINIMUM
MODULATION DEPTH
REQUIREMENT
0
1
0
1
Modulation Depth
50% (default)
DS41232D-page 107
75%
25%
12%
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