MCF51EM256CLK Freescale Semiconductor, MCF51EM256CLK Datasheet - Page 179

• Manufacturer Part Number: MCF51EM256CLK
• Description: IC MCU 32BIT 256KB FLASH 80LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLK

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 56
• 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 12x16b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-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

1
7.7.3
This high-page register contains status and control bits to configure the low power run and wait modes as
well as configure the stop mode behavior of the microcontroller. See
Mode (LPwait),”
SPMSC2 is not reset when exiting from stop2.
Freescale Semiconductor
PPDE is a write-once bit that can be used to permanently disable the PPDC bit.
Reset:
PPDACK
LPWUI
LPRS
PPDF
Field
LPR
7
6
5
4
3
2
W
R
System Power Management Status and Control 2 Register
(SPMSC2)
LPR
Low-Power Regulator Control. The LPR bit controls entry into the low-power run and low-power wait modes in
which the voltage regulator is put into standby. This bit cannot be set if PPDC=1. If PPDC and LPR are set in a
single write instruction, only PPDC is actually set. LPR is cleared when an interrupt occurs in low-power mode
and the LPWUI bit is 1.
0 Low-power run and low-power wait modes are disabled.
1 Low-power run and low-power wait modes are requested.
Low-Power Regulator Status. This read-only status bit indicates that the voltage regulator has entered into
standby for the low-power run or wait mode.
0 The voltage regulator is not currently in standby.
1 The voltage regulator is currently in standby.
Low-Power Wake-Up on Interrupt. This bit controls whether or not the voltage regulator exits standby when any
active MCU interrupt occurs.
0 The voltage regulator remains in standby on an interrupt.
1 The voltage regulator exits standby on an interrupt. LPR is cleared.
RESERVED
Partial Power-Down Flag — This read-only status bit indicates that the microcontroller has recovered from stop2
mode.
0 Microcontroller has not recovered from stop2 mode.
1 Microcontroller recovered from stop2 mode.
Partial Power-Down Acknowledge — Writing a 1 to PPDACK clears the PPDF bit.
Figure 7-3. System Power Management Status and Control 2 Register (SPMSC2)
0
7
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
for more information.
LPRS
0
6
Table 7-6. SPMSC2 Bit Field Descriptions
LPWUI
0
5
0
0
4
Description
PPDF
—
3
Resets, Interrupts, and General System Control
Section 6.7.2, “Low-Power Wait
PPDACK
0
0
2
PPDE
0
1
1
PPDC
0
0
7-13