MC9S08QG84CFFE Freescale Semiconductor, MC9S08QG84CFFE Datasheet - Page 189
MC9S08QG84CFFE
Manufacturer Part Number
MC9S08QG84CFFE
Description
IC MCU 8BIT 8K FLASH 16-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.MC9S08QG8CDTER.pdf
(314 pages)
Specifications of MC9S08QG84CFFE
Core Processor
HCS08
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
12
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
16-QFN
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
I2C, SCI, SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
12
Number Of Timers
1
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
For Use With
DEMO9S08QG8E - BOARD DEMO FOR MC9S08QG8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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13.3.2
MTIMCLK contains the clock select bits (CLKS) and the prescaler select bits (PS).
Freescale Semiconductor
CLKS
Field
7:6
5:4
3:0
PS
Reset:
W
R
Unused register bits, always read 0.
Clock Source Select — These two read/write bits select one of four different clock sources as the input to the
MTIM prescaler. Changing the clock source while the counter is active does not clear the counter. The count
continues with the new clock source. Reset clears CLKS to 000.
00
01
10
11
All other encodings default to the bus clock (BUSCLK).
Clock Source Prescaler — These four read/write bits select one of nine outputs from the 8-bit prescaler. Changing
the prescaler value while the counter is active does not clear the counter. The count continues with the new
prescaler value. Reset clears PS to 0000.
0000 Encoding 0. MTIM clock source ÷ 1
0001 Encoding 1. MTIM clock source ÷ 2
0010 Encoding 2. MTIM clock source ÷ 4
0011 Encoding 3. MTIM clock source ÷ 8
0100 Encoding 4. MTIM clock source ÷ 16
0101 Encoding 5. MTIM clock source ÷ 32
0110 Encoding 6. MTIM clock source ÷ 64
0111 Encoding 7. MTIM clock source ÷ 128
1000 Encoding 8. MTIM clock source ÷ 256
All other encodings default to MTIM clock source ÷ 256.
MTIM Clock Configuration Register (MTIMCLK)
Encoding 0. Bus clock (BUSCLK)
Encoding 1. Fixed-frequency clock (XCLK)
Encoding 3. External source (TCLK pin), falling edge
Encoding 4. External source (TCLK pin), rising edge
7
0
0
Table 13-3. MTIM Clock Configuration Register Field Description
Figure 13-5. MTIM Clock Configuration Register
0
0
6
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
0
5
CLKS
0
4
Description
0
3
0
2
PS
Modulo Timer (S08MTIMV1)
0
1
0
0
187
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