MC908SR12CFAE Freescale Semiconductor, MC908SR12CFAE Datasheet - Page 325
![IC MCU 12K FLASH 8MHZ 48-LQFP](/photos/12/45/124574/mc908sr12cfae_sml.jpg)
MC908SR12CFAE
Manufacturer Part Number
MC908SR12CFAE
Description
IC MCU 12K FLASH 8MHZ 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908SR12MFAE.pdf
(404 pages)
Specifications of MC908SR12CFAE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SCI
Peripherals
LVD, POR, PWM, Temp Sensor
Number Of I /o
31
Program Memory Size
12KB (12K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 14x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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18.4.2 Data Direction Register B (DDRB)
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
Address:
T2CH[1:0] — Timer 2 Channel I/O Bits
IRQ2 — External Interrupt Pin 2
Data direction register B determines whether each port B pin is an input
or an output. Writing a logic 1 to a DDRB bit enables the output buffer for
the corresponding port B pin; a logic 0 disables the output buffer.
Reset:
Read:
Write:
The T2CH1 and T2CH0 pins are the TIM2 input capture/output
compare pins. The edge/level select bits, ELSxB:ELSxA, determine
whether the PTB5/T2CH1 and PTB4/T2CH0 pins are timer channel
I/O pins or general-purpose I/O pins.See
Interface Module
IRQ2 pin is the second external interrupt input to the IRQ module.
When PTB6/IRQ2 is configured as an input by the data direction bit
bit, DDRB6, the pin is both a standard port input pin and an external
interrupt pin. See
PTB2/SDA1/TxD
PTB3/SCL1/RxD
$0005
Bit 7
Pin
0
0
Figure 18-7. Data Direction Register B (DDRB)
Table 18-3. PTB2 and PTB3 Pin Configurations
Input/Output (I/O) Ports
DDRB6
6
0
Section 19. External Interrupt
(TIM).
($0013)
ENSCI
DDRB5
Bit
0
0
0
1
5
0
DDRB4
($0049)
MMEN
4
0
Bit
X
0
1
1
DDRB3
SDASCL1
3
0
($0049)
Section 11. Timer
Bit
X
X
0
1
DDRB2
2
0
Input/Output (I/O) Ports
(IRQ).
SDA1, SCL1
PTB2, PTB3
PTB2, PTB3
Pin function
DDRB1
TxD, RxD
1
0
Data Sheet
DDRB0
Bit 0
Port B
0
325
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