MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 118

• Manufacturer Part Number: MCF51EM256CLL
• Description: IC MCU 32BIT 256KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLL

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 16x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Processor Series: MCF51EM
• Core: ColdFire V1
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: RS-232, LIN
• Maximum Clock Frequency: 50 MHz
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: DEMOEM
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pin mux controls leave GPIO input buffers enabled for all digital functions, regardless of mux control
selection. This gives you the ability to poll a port to decode a key pressed after a keyboard interrupt is fired.
The same function can be used for IRQ pin level detection and debounce software.
4.3.2
Refer to tables in
refers to registers and control bits only by their names.
4.3.2.1
The data register of each port allows software to interact with the pins of the chip. Each bit of each data
register controls one pin on the chip. When the port bit is configured as an input (PTxDD[n]=0), a read of
4-8
GPIO Programming Model
Port x Data Register (PTxD)
A Freescale Semiconductor-provided equate or header file normally is used
to translate these names into the appropriate absolute addresses.
Register
PTxTOG
PTxSET
PTxCLR
PTxDD
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Read xD
Write xD
Write xSET
Write xCLR
Write xTOG
Read xDD
Write xDD
PTxD
Chapter 3,
“Memory,” for the absolute address assignments for all registers. This section
Figure 4-6. GPIO Bit Block Diagram
Table 4-11. Register Set Summary
PTxDD[n]
PTxD[n]
PORTx Data Direction Register
PORTx TOGGLE Register
PORTx CLEAR Register
PORTx Data Register
PORTx SET Register
Description
NOTE
1
0
Port Data In
Port Output Enable
Port Data Out
read/write
read/write
Access
Freescale Semiconductor
write
write
write