MC9S08JM16CGT Freescale Semiconductor, MC9S08JM16CGT Datasheet - Page 55

• Manufacturer Part Number: MC9S08JM16CGT
• Description: MCU 8BIT 16K FLASH 48-QFN
• Manufacturer: Freescale Semiconductor
• Series: HCS08r

Specifications of MC9S08JM16CGT

• Core Processor: HCS08
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, LIN, SCI, SPI, USB
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-QFN Exposed Pad
• Processor Series: S08JM
• Core: HCS08
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 37
• Number Of Timers: 2
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWS08
• Development Tools By Supplier: DEMOJM, DEMOJMSKT, DEMOFLEXISJMSD, DEMO9S08JM16
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Controller Family/series: HCS08
• No. Of I/o's: 37
• Ram Memory Size: 1KB
• Cpu Speed: 48MHz
• No. Of Timers: 2
• Digital Ic Case Style: QFN
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4.7.1
Bit 7 of this register is a read-only status flag. Bits 6 through 0 may be read at any time but can be written
only one time. Before any erase or programming operations are possible, write to this register to set the
frequency of the clock for the nonvolatile memory system within acceptable limits.
Table 4-7
Freescale Semiconductor
Reset
PRDIV8
DIV[5:0]
DIVLD
Field
5:0
7
6
W
R
shows the appropriate values for PRDIV8 and DIV5:DIV0 for selected bus frequencies.
DIVLD
Flash Clock Divider Register (FCDIV)
Divisor Loaded Status Flag — When set, this read-only status flag indicates that the FCDIV register has been
written since reset. Reset clears this bit and the first write to this register causes this bit to become set regardless
of the data written.
0 FCDIV has not been written since reset; erase and program operations disabled for flash.
1 FCDIV has been written since reset; erase and program operations enabled for flash.
Prescale (Divide) Flash Clock by 8
0 Clock input to the flash clock divider is the bus rate clock.
1 Clock input to the flash clock divider is the bus rate clock divided by 8.
Divisor for Flash Clock Divider — The flash clock divider divides the bus rate clock (or the bus rate clock
divided by 8 if PRDIV8 = 1) by the value in the 6-bit DIV5:DIV0 field plus one. The resulting frequency of the
internal flash clock must fall within the range of 200 kHz to 150 kHz for proper flash operations. Program/Erase
timing pulses are one cycle of this internal flash clock which corresponds to a range of 5 μs to 6.7 μs. The
automated programming logic uses an integer number of these pulses to complete an erase or program
operation. See
0
7
= Unimplemented or Reserved
PRDIV8
if PRDIV8 = 1 – f
Equation
0
6
if PRDIV8 = 0 – f
Figure 4-5. Flash Clock Divider Register (FCDIV)
Table 4-6. FCDIV Register Field Descriptions
4-1,
MC9S08JM16 Series Data Sheet, Rev. 2
DIV5
Equation
0
5
FCLK
FCLK
= f
4-2, and
= f
Bus
DIV4
Bus
0
4
÷ (8 × ([DIV5:DIV0] + 1))
Table
÷ ([DIV5:DIV0] + 1)
Description
4-6.
DIV3
3
0
DIV2
0
2
DIV1
0
1
Chapter 4 Memory
Eqn. 4-1
Eqn. 4-2
DIV0
0
0
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