MC68HC908GP16CFB Freescale Semiconductor, MC68HC908GP16CFB Datasheet - Page 236
MC68HC908GP16CFB
Manufacturer Part Number
MC68HC908GP16CFB
Description
MCU 8-BIT 16K FLASH 44-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908EY16VFAR2.pdf
(278 pages)
Specifications of MC68HC908GP16CFB
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
33
Program Memory Size
16KB (16K 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 8x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC908GP16CFB
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Development Support
Table 19-1
effective baud rate is the bus frequency divided by 278. If using a crystal as the clock source, be aware
of the upper frequency limit that the internal clock module can handle. See
limit.
19.3.1.7 Commands
The monitor ROM firmware uses these commands:
The monitor ROM firmware echoes each received byte back to the PTA0 pin for error checking. An 11-bit
delay at the end of each command allows the host to send a break character to cancel the command. A
delay of two bit times occurs before each echo and before READ, IREAD, or READSP data is returned.
The data returned by a read command appears after the echo of the last byte of the command.
236
•
•
•
•
•
•
READ (read memory)
WRITE (write memory)
IREAD (indexed read)
IWRITE (indexed write)
READSP (read stack pointer)
RUN (run user program)
also lists external frequencies required to achieve a standard baud rate of 7200 bps. The
3
Wait one bit time after each echo before sending the next byte.
ECHO
Notes:
ECHO
Notes:
4
WRITE
1 = Echo delay, approximately 2 bit times
2 = Cancel command delay, 11 bit times
3 = Wait 1 bit time before sending next byte.
FROM
HOST
1 = Echo delay, approximately 2 bit times
2 = Data return delay, approximately 2 bit times
3 = Cancel command delay, 11 bit times
4 = Wait 1 bit time before sending next byte.
FROM
HOST
READ
1
1
WRITE
READ
MC68HC908EY16 • MC68HC908EY8 Data Sheet, Rev. 10
3
ADDRESS
4
HIGH
ADDRESS
Figure 19-14. Read Transaction
Figure 19-15. Write Transaction
HIGH
1
ADDRESS
1
HIGH
ADDRESS
HIGH
3
ADDRESS
NOTE
4
LOW
ADDRESS
LOW
1
ADDRESS
1
LOW
ADDRESS
LOW
3
DATA
3, 2
1
DATA
20.6 Control Timing
DATA
RETURN
4
Freescale Semiconductor
2, 3
for this
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