MC68331CEH20 Freescale Semiconductor, MC68331CEH20 Datasheet - Page 66
![IC MCU 32BIT 20MHZ 132-PQFP](/photos/39/60/396098/4243113_sml.jpg)
MC68331CEH20
Manufacturer Part Number
MC68331CEH20
Description
IC MCU 32BIT 20MHZ 132-PQFP
Manufacturer
Freescale Semiconductor
Series
M683xxr
Specifications of MC68331CEH20
Core Processor
CPU32
Core Size
32-Bit
Speed
20MHz
Connectivity
EBI/EMI, SCI, SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
18
Program Memory Type
ROMless
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
132-QFP
Controller Family/series
68K
No. Of I/o's
18
Cpu Speed
20MHz
No. Of Timers
1
Embedded Interface Type
QSPI, SCI, UART
No. Of Pwm Channels
2
Digital Ic Case Style
PQFP
Rohs Compliant
Yes
Processor Series
M683xx
Core
CPU32
Data Bus Width
32 bit
Data Ram Size
80 B
Interface Type
QSPI, SCI, UART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
18
Number Of Timers
1
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Cpu Family
68K/M683xx
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
20MHz
Program Memory Size
Not Required
Total Internal Ram Size
80Byte
# I/os (max)
18
Number Of Timers - General Purpose
1
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
132
Package Type
PQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Ram Size
-
Program Memory Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68331CEH20
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC68331CEH20
Manufacturer:
FREESCLA
Quantity:
20 000
SCCR1 — SCI Control Register 1
Bit 15 — Not Implemented
LOOPS — Loop Mode
WOMS — Wired-OR Mode for SCI Pins
ILT — Idle-Line Detect Type
66
RESET:
Nominal Baud Rate
15
0
0
*A rate of 64 baud is not available with a 20.97-MHz system clock. To achieve this rate, the SYNCR can be pro-
SCCR1 contains SCI configuration parameters. The CPU can read and write this register at any time.
The SCI can modify RWU in some circumstances. In general, interrupts enabled by these control bits
are cleared by reading SCSR, then reading (receiver status bits) or writing (transmitter status bits)
SCDR.
LOOPS controls a feedback path on the data serial shifter. When loop mode is enabled, SCI transmitter
output is fed back into the receive serial shifter. TXD is asserted (idle line). Both transmitter and receiver
must be enabled before entering loop mode.
WOMS determines whether the TXD pin is an open-drain output or a normal CMOS output. This bit is
used only when TXD is an output. If TXD is used as a general-purpose input pin, WOMS has no effect.
Maximum Rate
grammed to generate a lower system clock rate.
0 = Normal SCI operation, no looping, feedback path disabled
1 = Test SCI operation, looping, feedback path enabled
0 = If configured as an output, TXD is a normal CMOS output.
1 = If configured as an output, TXD is an open-drain output.
0 = Short idle-line detect (start count on first one)
1 = Long idle-line detect (start count on first one after stop bit(s))
19200
38400
76800
1200
2400
4800
9600
110
300
600
64*
14
0
0
13
0
0
12
0
Freescale Semiconductor, Inc.
16.78-MHz Clock
Actual Rate with
11
For More Information On This Product,
0
524288.0
19418.1
37449.1
74898.3
1199.7
2405.0
4810.0
9532.5
110.0
299.9
599.9
64.0
10
0
Go to: www.freescale.com
Table 25 SCI Baud Rates
9
0
8
0
SCBR Value
$1FFF
$06D4
$00DA
$006D
$129E
$036A
$000E
$0165
$0037
$0016
$0007
$0001
7
0
SCBR
6
0
5
0
20.97-MHz Clock
Actual Rate with
655360.0
19275.3
38550.6
72817.8
1200.3
2400.6
4783.6
9637.6
4
0
110.0
300.1
600.1
—
3
0
2
0
MC68331TS/D
SCBR Value
$1745
$0888
$0444
$0222
$0111
$0089
$0044
$0022
$0011
$0009
$0001
$YFFC0A
1
0
—
0
0