MC908GR32AVFAE Freescale Semiconductor, MC908GR32AVFAE Datasheet - Page 267

• Manufacturer Part Number: MC908GR32AVFAE
• Description: IC MCU 8BIT 32K FLASH 48-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908GR32AVFAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 37
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 24x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 48-LQFP
• Controller Family/series: HC08
• No. Of I/o's: 37
• Ram Memory Size: 1.5KB
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Embedded Interface Type: SCI, SPI
• Rohs Compliant: Yes
• Processor Series: HC08GR
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 1.5 KB
• Interface Type: ESCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 8
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, DEMO908GZ60E, M68CBL05CE, M68EML08GPGTE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 24 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

19.3 Monitor Module (MON)
The monitor module allows debugging and programming of the microcontroller unit (MCU) through a
single-wire interface with a host computer. Monitor mode entry can be achieved without use of the higher
test voltage, V
requirements for in-circuit programming.
Features of the monitor module include:
19.3.1 Functional Description
Figure 19-9
The monitor module receives and executes commands from a host computer.
Figure 19-10
a host computer via a standard RS-232 interface.
Simple monitor commands can access any memory address. In monitor mode, the MCU can execute
code downloaded into RAM by a host computer while most MCU pins retain normal operating mode
functions. All communication between the host computer and the MCU is through the PTA0 pin. A
level-shifting and multiplexing interface is required between PTA0 and the host computer. PTA0 is used
in a wired-OR configuration and requires a pullup resistor.
Table 19-1
may be entered after a power-on reset (POR) and will allow communication at 7200 baud provided one
of the following sets of conditions is met:
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH difficult for
Freescale Semiconductor
unauthorized users.
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Normal user-mode pin functionality
One pin dedicated to serial communication between MCU and host computer
Standard non-return-to-zero (NRZ) communication with host computer
Standard communication baud rate (7200 @ 2-MHz bus frequency)
Execution of code in random-access memory (RAM) or FLASH
FLASH memory security feature
FLASH memory programming interface
Monitor mode entry without high voltage, V
$FF)
Normal monitor mode entry if V
If $FFFE and $FFFF does not contain $FF (programmed state):
–
–
–
If $FFFE and $FFFF do not contain $FF (programmed state):
–
–
–
If $FFFE and $FFFF contain $FF (erased state):
–
–
The external clock is 4.0 MHz (7200 baud)
PTB4 = low
IRQ = V
The external clock is 8.0 MHz (7200 baud)
PTB4 = high
IRQ = V
The external clock is 8.0 MHz (7200 baud)
IRQ = V
shows the pin conditions for entering monitor mode. As specified in the table, monitor mode
shows a simplified diagram of the monitor mode.
and
TST
MC68HC908GR60A • MC68HC908GR48A • MC68HC908GR32A Data Sheet, Rev. 5
, as long as vector addresses $FFFE and $FFFF are blank, thus reducing the hardware
Figure 19-11
TST
TST
DD
(this can be implemented through the internal IRQ pullup) or V
show example circuits used to enter monitor mode and communicate with
TST
(1)
is applied to IRQ
TST
, if reset vector is blank ($FFFE and $FFFF contain
Monitor Module (MON)
SS
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