MC908QB4CDTE Freescale Semiconductor, MC908QB4CDTE Datasheet - Page 47

• Manufacturer Part Number: MC908QB4CDTE
• Description: IC MCU 8BIT 4K FLASH 16-TSSOP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908QB4CDTE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-TSSOP
• Processor Series: HC08QB
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: 3-Wire, ESCI, SPI, UART
• Number Of Programmable I/os: 13
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, M68CBL05AE, DEMO908QB8, DEMO908QC16
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 10 Channel
• Package: 16TSSOP
• Family Name: HC08
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ADCH[4:0] — Channel Select Bits
Freescale Semiconductor
(with ACLKEN low), continuous conversions will cease and can be restarted only with a write to
ADSCR. Any write to ADSCR with ADCO set and the ADCH bits not all 1s will abort the current
conversion and begin continuous conversions.
If the bus frequency is less than the ADCK frequency, precise sample time for continuous conversions
cannot be guaranteed in short-sample mode (ADLSMP = 0). If the bus frequency is less than 1/11th
of the ADCK frequency, precise sample time for continuous conversions cannot be guaranteed in
long-sample mode (ADLSMP = 1).
When clear, the ADC10 will perform a single conversion (single conversion mode) each time ADSCR
is written (assuming the ADCH[4:0] bits do not decode all 1s).
The ADCH[4:0] bits form a 5-bit field that is used to select one of the input channels. The input
channels are detailed in
when the channel select bits are all set to 1. This feature allows explicit disabling of the ADC10 and
isolation of the input channel from the I/O pad. Terminating continuous conversion mode this way will
prevent an additional, single conversion from being performed. It is not necessary to set the channel
select bits to all 1s to place the ADC10 in a low-power state, however, because the module is
automatically placed in a low-power state when a conversion completes.
1 = Continuous conversion following a write to ADSCR
0 = One conversion following a write to ADSCR
1. If any unused or reserved channels are selected, the resulting conversion will
2. Requires LVI to be powered (LVIPWRD =0, in CONFIG1)
ADCH4
be unknown.
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
Table
ADCH3
0
0
0
0
0
0
0
0
1
0
1
1
1
1
1
1
1
1
3-2. The successive approximation converter subsystem is turned off
Continuing through
Table 3-2. Input Channel Select
MC68HC908QB8 Data Sheet, Rev. 3
ADCH2
0
0
0
0
1
1
1
1
0
1
0
0
0
0
1
1
1
1
ADCH1
0
0
1
1
0
0
1
1
0
1
0
0
1
1
0
0
1
1
ADCH0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
BANDGAP REF
Low-power state
Input Select
Reserved
Reserved
Unused
Unused
Unused
V
V
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
REFH
REFL
(1)
(2)
Registers
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