S9S08SG8E2CTJ Freescale Semiconductor, S9S08SG8E2CTJ Datasheet - Page 251
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S9S08SG8E2CTJ
Manufacturer Part Number
S9S08SG8E2CTJ
Description
MCU 2K FLASH 20-TSSOP
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.S9S08SG4E2CSC.pdf
(316 pages)
Specifications of S9S08SG8E2CTJ
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, LIN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-TSSOP
Processor Series
S08SG
Core
HCS08
Data Bus Width
8 bit
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMO9S08SG32, DEMO9S08SG32AUTO, DEMO9S08SG8, DEMO9S08SG8AUTO
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
S9S08SG8E2CTJ
Manufacturer:
FREESCALE
Quantity:
20 000
Company:
Part Number:
S9S08SG8E2CTJR
Manufacturer:
SAMSUNG
Quantity:
400 000
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The following sections describe the main counter and each of the timer operating modes (input capture,
output compare, edge-aligned PWM, and center-aligned PWM). Because details of pin operation and
interrupt activity depend upon the operating mode, these topics will be covered in the associated mode
explanation sections.
16.4.1
All timer functions are based on the main 16-bit counter (TPMxCNTH:TPMxCNTL). This section
discusses selection of the clock source, end-of-count overflow, up-counting vs. up/down counting, and
manual counter reset.
16.4.1.1
The 2-bit field, CLKSB:CLKSA, in the timer status and control register (TPMxSC) selects one of three
possible clock sources or OFF (which effectively disables the TPM). See
CLKSB:CLKSA=0:0 so no clock source is selected, and the TPM is in a very low power state. These
control bits may be read or written at any time and disabling the timer (writing 00 to the CLKSB:CLKSA
field) does not affect the values in the counter or other timer registers.
The bus rate clock is the main system bus clock for the MCU. This clock source requires no
synchronization because it is the clock that is used for all internal MCU activities including operation of
the CPU and buses.
In MCUs that have no PLL and FLL or the PLL and FLL are not engaged, the fixed system clock source
is the same as the bus-rate-clock source, and it does not go through a synchronizer. When a PLL or FLL
is present and engaged, a synchronizer is required between the crystal divided-by two clock source and the
timer counter so counter transitions will be properly aligned to bus-clock transitions. A synchronizer will
be used at chip level to synchronize the crystal-related source clock to the bus clock.
The external clock source may be connected to any TPM channel pin. This clock source always has to pass
through a synchronizer to assure that counter transitions are properly aligned to bus clock transitions. The
bus-rate clock drives the synchronizer; therefore, to meet Nyquist criteria even with jitter, the frequency of
the external clock source must not be faster than the bus rate divided-by four. With ideal clocks the external
clock can be as fast as bus clock divided by four.
When the external clock source shares the TPM channel pin, this pin should not be used for other channel
timing functions. For example, it would be ambiguous to configure channel 0 for input capture when the
TPM channel 0 pin was also being used as the timer external clock source. (It is the user’s responsibility
Freescale Semiconductor
Counter
Counter Clock Source
CLKSB:CLKSA
00
01
10
11
Table 16-8. TPM Clock Source Selection
MC9S08SG8 MCU Series Data Sheet, Rev. 6
No clock selected (TPM counter disabled)
TPM Clock Source to Prescaler Input
Fixed system clock
External source
Bus rate clock
Chapter 16 Timer/PWM Module (S08TPMV3)
Table
16-4. After any MCU reset,
251
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