MC68332GCEH16 Freescale Semiconductor, MC68332GCEH16 Datasheet - Page 91

• Manufacturer Part Number: MC68332GCEH16
• Description: IC MCU 32BIT 16MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68332GCEH16

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, SCI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Type: ROMless
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 132-QFP
• Cpu Family: 68K/M683xx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 16MHz
• Interface Type: QSPI/SCI/UART
• Program Memory Size: Not Required
• Total Internal Ram Size: 2KB
• # I/os (max): 15
• Number Of Timers - General Purpose: 16
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 132
• Package Type: PQFP
• Controller Family/series: 68K
• No. Of I/o's: 15
• Ram Memory Size: 2KB
• Cpu Speed: 16MHz
• No. Of Timers: 16
• Embedded Interface Type: QSPI, SCI, UART
• Digital Ic Case Style: PQFP
• Rohs Compliant: Yes
• Processor Series: M683xx
• Core: CPU32
• Data Bus Width: 32 bit
• Data Ram Size: 2 KB
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 16
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Compliant

4.8.1 Chip-Select Registers
MC68332
USER’S MANUAL
in the corresponding option register is programmed to a nonzero value, selecting a
transfer size. The chip-select option must not be written until a base address has been
written to a proper base address register. CSBOOT is automatically asserted out of
reset. Alternate functions for chip-select pins are enabled if appropriate data bus pins
are held low at the release of the reset signal (refer to 4.6.3.1 Data Bus Mode Selec-
tion for more information). Figure 4-18 is a functional diagram of a single chip-select
circuit.
Each chip-select pin can have one or more functions. Chip-select pin assignment reg-
isters (CSPAR[0:1]) determine functions of the pins. Pin assignment registers also de-
termine port size (8- or 16-bit) for dynamic bus allocation. A pin data register (PORTC)
latches data for chip-select pins that are used for discrete output.
Blocks of addresses are assigned to each chip-select function. Block sizes of two
Kbytes to one Mbyte can be selected by writing values to the appropriate base address
register (CSBAR[0:10], CSBARBT). Address blocks for separate chip-select functions
can overlap.
Chip select option registers (CSOR[0:10], CSORBT) determine timing of and condi-
tions for assertion of chip-select signals. Eight parameters, including operating mode,
access size, synchronization, and wait state insertion can be specified.
Initialization software usually resides in a peripheral memory device controlled by the
chip-select circuits. A set of special chip-select functions and registers (CSORBT, CS-
BARBT) is provided to support bootstrap operation.
Comprehensive address maps and register diagrams are provided in APPENDIX D
REGISTER SUMMARY.
BUS CONTROL
DSACK
AVEC
INTERNAL
ADDRESS
SIGNALS
Figure 4-18 Chip-Select Circuit Block Diagram
GENERATOR
AVEC
Freescale Semiconductor, Inc.
For More Information On This Product,
BASE ADDRESS REGISTER
ADDRESS COMPARATOR
OPTION REGISTER
OPTION COMPARE
SYSTEM INTEGRATION MODULE
Go to: www.freescale.com
GENERATOR
DSACK
ASSIGNMENT
REGISTER
PIN
CONTROL
TIMING
AND
REGISTER
DATA
PIN
PIN
CHIP SEL BLOCK
4-51