MCHC912B32CFUE8 Freescale Semiconductor, MCHC912B32CFUE8 Datasheet - Page 75

• Manufacturer Part Number: MCHC912B32CFUE8
• Description: IC MCU 32K FLASH 8MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MCHC912B32CFUE8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 768 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Cpu Family: HC12
• Device Core Size: 16b
• Frequency (max): 8MHz
• Interface Type: SCI/SPI
• Total Internal Ram Size: 1KB
• # I/os (max): 63
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Package: 80PQFP
• Family Name: HC12
• Maximum Speed: 8 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 63
• Processor Series: HC912B
• Core: HC12
• Data Ram Size: 1 KB
• Maximum Clock Frequency: 8 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: M68EVB912B32E
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Chapter 5
Operating Modes and Resource Mapping
5.1 Introduction
The MCU can operate in eight different modes. Each mode has a different default memory map and
external bus configuration. After reset, most system resources can be mapped to other addresses by
writing to the appropriate control registers.
5.2 Operating Modes
The states of the BKGD, MODB, and MODA pins during reset determine the operating mode after reset.
The SMODN, MODB, and MODA bits in the MODE register show current operating mode and provide
limited mode switching during operation. The states of the BKGD, MODB, and MODA pins are latched
into these bits on the rising edge of the reset signal. During reset an active pullup is connected to the
BKGD pin (as input) and active pulldowns are connected to the MODB and MODA pins. If an open occurs
on any of these pins, the device will operate in normal single-chip mode.
The two basic types of operating modes are:
A system development and debug feature, background debug mode (BDM) is available in all modes. In
special single-chip mode, BDM is active immediately after reset.
Freescale Semiconductor
BKGD
1. Normal modes — Some registers and bits are protected against accidental changes.
2. Special modes — Protected control registers and bits are allowed greater access for special
0
0
0
0
1
1
1
1
purposes such as testing and emulation.
MODB
0
0
1
1
0
0
1
1
MODA
0
1
0
1
0
1
0
1
Special expanded narrow
Normal expanded narrow
Special expanded wide
Normal expanded wide
(forced to peripheral)
Special single chip
Normal single chip
Special peripheral
M68HC12B Family Data Sheet, Rev. 9.1
Reserved
Table 5-1. Mode Selection
Mode
General-purpose I/O
General-purpose I/O
ADDR[15:8]
ADDR[15:8]
DATA[7:0]
DATA[7:0]
Port A
ADDR
ADDR
ADDR
DATA
DATA
DATA
—
General-purpose I/O
General-purpose I/O
ADDR[7:0]
ADDR[7:0]
Port B
ADDR
ADDR
ADDR
DATA
DATA
DATA
—
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