MC68332ACPV25 Freescale Semiconductor, MC68332ACPV25 Datasheet - Page 31

• Manufacturer Part Number: MC68332ACPV25
• Description: IC MCU 32-BIT 25MHZ A MASK
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68332ACPV25

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 25MHz
• 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: 144-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: Q1501580

3.5.1 Chip-Select Registers
3.5.2 Pin Assignment Registers
CSPAR0 —Chip Select Pin Assignment Register 0
MC68332
MC68332TS/D
RESET:
15
0
0
Pin assignment registers CSPAR0 and CSPAR1 determine functions of chip-select pins. These regis-
ters also determine port size (8- or 16-bit) for dynamic bus allocation.
A pin data register (PORTC) latches discrete output data.
Blocks of addresses are assigned to each chip-select function. Block sizes of 2 Kbytes to 1 Mbyte can
be selected by writing values to the appropriate base address register (CSBAR). Address blocks for
separate chip-select functions can overlap.
Chip-select option registers (CSORBT and CSOR[10:0]) determine timing of and conditions for asser-
tion of chip-select signals. Eight parameters, including operating mode, access size, synchronization,
and wait state insertion can be specified.
Initialization code often resides in a peripheral memory device controlled by the chip-select circuits. A
set of special chip-select functions and registers (CSORBT, CSBARBT) is provided to support bootstrap
operation.
The pin assignment registers (CSPAR0 and CSPAR1) contain pairs of bits that determine the function
of chip-select pins. The pin assignment encodings used in these registers are shown below.
CSPAR0 contains seven 2-bit fields that determine the functions of corresponding chip-select pins.
CSPAR0[15:14] are not used. These bits always read zero; writes have no effect. CSPAR0 bit 1 always
reads one; writes to CSPAR0 bit 1 have no effect.
CSPAR0 Field
14
0
0
CSPA0[6]
CSPA0[5]
CSPA0[4]
CSPA0[3]
CSPA0[2]
CSPA0[1]
CSBOOT
DATA2
13
CSPA0[6]
12
1
Freescale Semiconductor, Inc.
DATA2
11
For More Information On This Product,
CSPA0[5]
Chip Select Signal
Bit Field
Table 12 Pin Assignment Encodings
Table 13 CSPAR0 Pin Assignments
00
01
10
11
CSBOOT
10
1
CS5
CS4
CS3
CS2
CS1
CS0
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DATA2
9
CSPA0[4]
Chip Select (16-Bit Port)
8
1
Chip Select (8-Bit Port)
Alternate Function
Discrete Output
DATA1
Description
7
CSPA0[3]
Alternate Signal
BGACK
6
1
FC2
FC1
FC0
BG
BR
—
DATA1
5
CSPA0[2]
4
1
DATA1
Discrete Output
3
CSPA0[1]
PC2
PC1
PC0
—
—
—
—
2
1
MOTOROLA
$YFFA44
1
1
CSBOOT
DATA0
0
31