MC9S08RD32CPE Freescale Semiconductor, MC9S08RD32CPE Datasheet - Page 50

• Manufacturer Part Number: MC9S08RD32CPE
• Description: IC MCU 32K FLASH 2K RAM 28-DIP
• Manufacturer: Freescale Semiconductor
• Series: HCS08r

Specifications of MC9S08RD32CPE

• Core Processor: HCS08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Memory
Table 4-6
50
PRDIV8
DIV[5:0]
DIVLD
Field
5:0
7
6
Reset
W
R
shows the appropriate values for PRDIV8 and DIV5:DIV0 for selected bus frequencies.
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
DIVLD
200 kHz
150 kHz
8 MHz
4 MHz
2 MHz
1 MHz
f
0
7
Bus
if PRDIV8 = 1 — f
= Unimplemented or Reserved
(Binary)
PRDIV8
if PRDIV8 = 0 — f
PRDIV8
Figure 4-5. FLASH Clock Divider Register (FCDIV)
0
0
0
0
0
0
6
0
Table 4-6. FLASH Clock Divider Settings
Equation 4-1
MC9S08RC/RD/RE/RG Data Sheet, Rev. 1.11
Table 4-5. FCDIV Field Descriptions
DIV5:DIV0
(Decimal)
DIV5
FCLK
0
39
19
5
9
4
0
0
FCLK
and
= f
= f
Bus
Equation
Bus
DIV4
÷ (8 × ([DIV5:DIV0] + 1))
200 kHz
200 kHz
200 kHz
200 kHz
200 kHz
150 kHz
4
0
f
FCLK
Description
÷ ([DIV5:DIV0] + 1)
4-2.
DIV3
Program/Erase Timing Pulse
0
3
(5 µs Min, 6.7 µs Max)
DIV2
6.7 µs
5 µs
5 µs
5 µs
5 µs
5 µs
2
0
Freescale Semiconductor
DIV1
0
1
Eqn. 4-1
Eqn. 4-2
DIV0
0
0