S9S12GA240F0MLF Freescale Semiconductor, S9S12GA240F0MLF Datasheet - Page 577

• Manufacturer Part Number: S9S12GA240F0MLF
• Description: 16-bit Microcontrollers - MCU 16BIT 240KB FLASH
• Manufacturer: Freescale Semiconductor

Specifications of S9S12GA240F0MLF

• Rohs: yes
• Core: S12
• Processor Series: MC9S12G
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 240 KB
• Data Ram Size: 4 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3.13 V to 5.5 V
• Operating Temperature Range: - 40 C to + 125 C
• Package / Case: LQFP-48
• Mounting Style: SMD/SMT

The DAC resistor network itself can work on two different voltage ranges:
Table 17-7
sections below.
17.5.2
The “Off” mode is the default mode after reset and is selected by DACCTL.DACM[2:0] = 0x0. During this
mode the DAC resistor network and the operational amplifier are disabled and all switches are open. This
mode provides the lowest power consumption. For decoding of the control signals see
17.5.3
The “Operational Amplifier” mode is selected by DACCTL.DACM[2:0] = 0x1. During this mode the
operational amplifier can be used independent from the DAC resister network. All required amplifier
signals, AMP, AMPP and AMPM are available on the pins. The DAC resistor network output is
disconnected from the DACU pin. The connection between the amplifier output and the negative amplifier
input is open. For decoding of the control signals see
Freescale Semiconductor
Unbuffered DAC with
Operational amplifier
Operational amplifier
Unbuffered DAC with
Operational amplifier
Operational amplifier
Unbuffered DAC
Full Voltage Range (FVR)
Reduced Voltage Range
Unbuffered DAC
Buffered DAC
Buffered DAC
Off
DAC Mode
shows the control signal decoding for each mode. For more detailed mode description see the
Mode “Off”
Mode “Operational Amplifier”
DACM
000
001
100
101
111
001
100
101
111
Table 17-6. DAC Resistor Network Voltage ranges
DAC resistor network provides a output voltage over the complete input voltage range,
default after reset
DAC resistor network provides a output voltage over a reduced input voltage range
DAC resistor
MC9S12G Family Reference Manual, Rev.1.23
network
disabled
enabled
enabled
enabled
disabled
Table 17-5. DAC Modes of Operation
Table 17-7. DAC Control Signals
enabled
enabled
enabled
disabled
Operational
Amplifier
disabled
disabled
enabled
enabled
enabled
Table
disabled
enabled
enabled
enabled
17-7.
Description
Switch S1
closed
closed
open
open
open
unbuffered resistor
unbuffered resistor
output voltage
output voltage
disconnected
disabled
Digital Analog Converter (DAC_8B5V)
Switch S2
closed
open
open
open
open
Table
depend on AMPP
depend on AMPP
and AMPM input
and AMPM input
buffered resistor
output voltage
disconnected
Switch S3
17-7.
closed
closed
open
open
open
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