SAF-XC878-16FFI 5V AA Infineon Technologies, SAF-XC878-16FFI 5V AA Datasheet - Page 98
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SAF-XC878-16FFI 5V AA
Manufacturer Part Number
SAF-XC878-16FFI 5V AA
Description
IC MCU 8BIT FLASH 64-LQFP
Manufacturer
Infineon Technologies
Series
XC8xxr
Specifications of SAF-XC878-16FFI 5V AA
Core Processor
XC800
Core Size
8-Bit
Speed
27MHz
Connectivity
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)
4.5 V ~ 5.5 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
-
Other names
SP000447252
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Table 32
24 MHz
12 MHz
8 MHz
6 MHz
3.13.2
In UART modes 1 and 3 of UART module, Timer 1 can be used for generating the
variable baud rates. In theory, this timer could be used in any of its modes. But in
practice, it should be set into auto-reload mode (Timer 1 mode 2), with its high byte set
to the appropriate value for the required baud rate. The baud rate is determined by the
Timer 1 overflow rate and the value of SMOD as follows:
3.14
Setting bit FDM in register FDCON to 1 configures the fractional divider to normal divider
mode, while at the same time disables baud rate generation (see
fractional divider is enabled (FDEN = 1), it functions as an 8-bit auto-reload timer (with
no relation to baud rate generation) and counts up from the reload value with each input
clock pulse. Bit field RESULT in register FDRES represents the timer value, while bit
field STEP in register FDSTEP defines the reload value. At each timer overflow, an
overflow flag (FDCON.NDOV) will be set and an interrupt request generated. This gives
an output clock f
The output frequency in normal divider mode is derived as follows:
Data Sheet
f
PCLK
Baud Rate Generation using Timer 1
Normal Divider Mode (8-bit Auto-reload Timer)
Deviation Error for UART with Fractional Divider enabled
Prescaling Factor
(2BRPRE)
1
1
1
1
MOD
that is 1/n of the input clock f
Mode 1, 3 baud rate
f
MOD
Reload Value
(BR_VALUE + 1)
6 (6
3 (3
2 (2
6 (6
=
H
H
H
H
f
)
)
)
)
DIV
91
=
---------------------------------------------------- -
32 2
×
----------------------------- -
256 STEP
2
×
SMOD
DIV
–
×
, where n is defined by 256 - STEP.
1
(
256 TH1
×
STEP
59 (3B
59 (3B
59 (3B
236 (EC
f
PCLK
–
H
H
H
Functional Description
)
)
)
H
)
)
Figure
Deviation
Error
+0.03 %
+0.03 %
+0.03 %
+0.03 %
26). Once the
XC87xCLM
V1.5, 2011-03
(3.6)
(3.7)
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