MC68HC908GZ8 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GZ8 Datasheet - Page 51
MC68HC908GZ8
Manufacturer Part Number
MC68HC908GZ8
Description
M68HC08 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC908GZ8.pdf
(314 pages)
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is used when compatibility with 8-bit ADC designs are required. No interlocking between ADRH and ADRL
is present.
3.4 Monotonicity
The conversion process is monotonic and has no missing codes.
3.5 Interrupts
When the AIEN bit is set, the ADC module is capable of generating CPU interrupts after each ADC
conversion. A CPU interrupt is generated if the COCO bit is at logic 0. The COCO bit is not used as a
conversion complete flag when interrupts are enabled.
3.6 Low-Power Modes
The WAIT and STOP instruction can put the MCU in low power-consumption standby modes.
Freescale Semiconductor
Quantization error is affected when only the most significant eight bits are
used as a result. See
RESULT
003
002
001
000
8-BIT
RESULT
10-BIT
00B
00A
009
008
007
006
005
004
003
002
001
000
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
1/2
IDEAL 10-BIT CHARACTERISTIC
WITH QUANTIZATION = ±1/2
1 1/2
Figure 3-3. Bit Truncation Mode Error
IDEAL 8-BIT CHARACTERISTIC
WITH QUANTIZATION = ±1/2
1/2
2 1/2
Figure
3 1/2
4 1/2
3-3.
5 1/2
1 1/2
NOTE
6 1/2
7 1/2
8 1/2
9 1/2
WHEN TRUNCATION IS USED,
ERROR FROM IDEAL 8-BIT = 3/8 LSB
DUE TO NON-IDEAL QUANTIZATION.
2 1/2
INPUT VOLTAGE
REPRESENTED AS 10-BIT
INPUT VOLTAGE
REPRESENTED AS 8-BIT
10-BIT TRUNCATED
TO 8-BIT RESULT
Monotonicity
51
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