MC908MR8MPE Freescale Semiconductor, MC908MR8MPE Datasheet - Page 277

• Manufacturer Part Number: MC908MR8MPE
• Description: IC MCU 8BIT 8K FLASH 28-PDIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908MR8MPE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 12
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
SCP1 and SCP0 — SCI Baud Rate Prescaler Bits
SCR2–SCR0 — SCI Baud Rate Select Bits
Use this formula to calculate the SCI baud rate:
where:
Table 13-7
4.00-MHz crystal and the CGM set for an f
4.9152-MHz crystal with the CGM set for an an f
These read/write bits select the baud rate prescaler divisor as shown
in
These read/write bits select the SCI baud rate divisor as shown in
Table
f
PD = prescaler divisor
BD = baud rate divisor
OP
Table
= clock source (f
Serial Communications Interface (SCI)
13-6. Reset clears SCR2–SCR0.
13-5. Reset clears SCP1 and SCP0.
shows the SCI baud rates that can be generated with a
SCR2:SCR1:SCR0
Table 13-5. SCI Baud Rate Prescaling
Table 13-6. SCI Baud Rate Selection
SCP1:SCP0
000
001
010
011
100
101
110
111
Baud rate =
00
01
10
11
Bus
)
f
OP
/ 64 x PD x BD
Baud Rate Divisor (BD)
Serial Communications Interface (SCI)
Prescaler Divisor (PD)
OP
of 8.00 MHz and with a
128
13
16
32
64
OP
1
3
4
1
2
4
8
of 7.3728 MHz.
Technical Data
I/O Registers
277