SAF-XC878CM-16FFI 3V3 AC Infineon Technologies, SAF-XC878CM-16FFI 3V3 AC Datasheet - Page 84
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SAF-XC878CM-16FFI 3V3 AC
Manufacturer Part Number
SAF-XC878CM-16FFI 3V3 AC
Description
IC MCU 8BIT 64KB FLASH 64LQFP
Manufacturer
Infineon Technologies
Series
XC8xxr
Specifications of SAF-XC878CM-16FFI 3V3 AC
Core Processor
XC800
Core Size
8-Bit
Speed
27MHz
Connectivity
CAN, SPI, SSI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
40
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
3.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-LFQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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not be bypassed for this PLL mode. The PLL mode is used during normal system
operation.
System Frequency Selection
For the XC87x, the value of NF, NR and OD can be selected by bits NDIV, PDIV and
KDIV respectively for different oscillator inputs inorder to obtain the required fsys. But the
combination of these factors must fulfill the following condition:
•
•
Table 26
and maximum frequency of 160 MHz (CPU clock = 26.67 MHz)can be obtained for the
different oscillator sources.
Table 26
Oscillator
On-chip
External
3.8.1
The oscillator circuit, a Pierce oscillator, is designed to work with both, an external crystal
oscillator or an external stable clock source. It basically consists of an inverting amplifier
and a feedback element with XTAL1 as input, and XTAL2 as output.
When using a crystal, a proper external oscillator circuitry must be connected to both
pins, XTAL1 and XTAL2. The crystal frequency can be within the range of 2 MHz to
20 MHz. Additionally, it is necessary to have two load capacitances
depending on the crystal type, a series resistor
may be temporarily inserted to measure the oscillation allowance (negative resistance)
of the oscillator circuitry.
external feedback resistor
values and related operating range are dependent on the crystal frequency and have to
be determined and optimized together with the crystal vendor using the negative
Data Sheet
100 MHz < f
800 KHz < f
provides examples on how the typical system frequency of fsys = 144 MHz
Recommended External Oscillator Circuits
System frequency (
OSC
VCO
/ (2 * NR) < 8 MHz
< 175 MHz
fosc
4 MHz
8 MHz
6 MHz
4 MHz
4 MHz
R
R
f
Q
is also required in the external oscillator circuitry. The exact
values are typically specified by the crystal vendor. An
f
SYS
f
N
72
80
72
72
72
sys
=
= 144 MHz)
f
OSC
77
x
P
2
2
4
3
2
NR
R
X2
NF
x
, to limit the current. A test resistor
OD
K
1
1
1
1
1
fsys
144 MHz
160 MHz
144 MHz
144 MHz
144 MHz
Functional Description
C
X1
and
XC87xCLM
V1.5, 2011-03
C
X2
, and
(3.2)
R
Q
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