MC9S08AC32MFDE Freescale Semiconductor, MC9S08AC32MFDE Datasheet - Page 226
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MC9S08AC32MFDE
Manufacturer Part Number
MC9S08AC32MFDE
Description
MCU 8BIT 32K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.MC9S08AC60CFJE.pdf
(348 pages)
Specifications of MC9S08AC32MFDE
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
38
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
48-QFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Chapter 13 Serial Communications Interface (S08SCIV4)
1
When using an internal oscillator in a LIN system, it is necessary to raise the break detection threshold by
one bit time. Under the worst case timing conditions allowed in LIN, it is possible that a 0x00 data
character can appear to be 10.26 bit times long at a slave which is running 14% faster than the master. This
would trigger normal break detection circuitry which is designed to detect a 10 bit break symbol. When
the LBKDE bit is set, framing errors are inhibited and the break detection threshold changes from 10 bits
to 11 bits, preventing false detection of a 0x00 data character as a LIN break symbol.
13.2.6
226
Setting RXINV inverts the RxD input for all cases: data bits, start and stop bits, break, and idle.
Reset
LBKDE
TXDIR
Field
Field
RAF
R8
T8
1
0
7
6
5
W
R
SCI Control Register 3 (SCIxC3)
LIN Break Detection Enable— LBKDE is used to select a longer break character detection length. While
LBKDE is set, framing error (FE) and receive data register full (RDRF) flags are prevented from setting.
0 Break character is detected at length of 10 bit times (11 if M = 1).
1 Break character is detected at length of 11 bit times (12 if M = 1).
Receiver Active Flag — RAF is set when the SCI receiver detects the beginning of a valid start bit, and RAF is
cleared automatically when the receiver detects an idle line. This status flag can be used to check whether an
SCI character is being received before instructing the MCU to go to stop mode.
0 SCI receiver idle waiting for a start bit.
1 SCI receiver active (RxD input not idle).
Ninth Data Bit for Receiver — When the SCI is configured for 9-bit data (M = 1), R8 can be thought of as a
ninth receive data bit to the left of the MSB of the buffered data in the SCIxD register. When reading 9-bit data,
read R8 before reading SCIxD because reading SCIxD completes automatic flag clearing sequences which
could allow R8 and SCIxD to be overwritten with new data.
Ninth Data Bit for Transmitter — When the SCI is configured for 9-bit data (M = 1), T8 may be thought of as a
ninth transmit data bit to the left of the MSB of the data in the SCIxD register. When writing 9-bit data, the entire
9-bit value is transferred to the SCI shift register after SCIxD is written so T8 should be written (if it needs to
change from its previous value) before SCIxD is written. If T8 does not need to change in the new value (such
as when it is used to generate mark or space parity), it need not be written each time SCIxD is written.
TxD Pin Direction in Single-Wire Mode — When the SCI is configured for single-wire half-duplex operation
(LOOPS = RSRC = 1), this bit determines the direction of data at the TxD pin.
0 TxD pin is an input in single-wire mode.
1 TxD pin is an output in single-wire mode.
R8
0
7
= Unimplemented or Reserved
T8
0
6
Table 13-6. SCIxS2 Field Descriptions (continued)
Figure 13-10. SCI Control Register 3 (SCIxC3)
Table 13-7. SCIxC3 Field Descriptions
MC9S08AC60 Series Data Sheet, Rev. 2
TXDIR
0
5
TXINV
0
4
Description
Description
ORIE
3
0
NEIE
0
2
Freescale Semiconductor
FEIE
0
1
PEIE
0
0
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