MCHC908JW32FAE Freescale Semiconductor, MCHC908JW32FAE Datasheet - Page 93

• Manufacturer Part Number: MCHC908JW32FAE
• Description: IC MCU 32K FLASH 8MHZ 48-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MCHC908JW32FAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI, USB
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 29
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 48-LQFP
• Controller Family/series: HC08
• No. Of I/o's: 48
• Ram Memory Size: 1KB
• Cpu Speed: 8MHz
• No. Of Timers: 1
• Embedded Interface Type: SPI
• Rohs Compliant: Yes
• Processor Series: HC08JW
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SPI, USB
• Number Of Programmable I/os: 29
• Number Of Timers: 2
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, DEMO908GZ60E, M68EML08GZE, KITUSBSPIDGLEVME, KITUSBSPIEVME, KIT33810EKEVME
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Chapter 7
Monitor Mode (MON)
7.1 Introduction
This section describes the monitor mode (MON). The monitor mode allows complete testing of the MCU
through a single-wire interface with a host computer.
7.2 Features
Features of the monitor mode include:
7.3 Functional Description
The monitor module receives and executes commands from a host computer.
example circuit used to enter monitor mode and communicate with 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.
The monitor code allows enabling the PLL to generate the internal clock, provided the reset vector is
blank, when the device is being clocked by a low-frequency crystal. This entry method, which is enabled
when IRQ is held low out of reset, is intended to support serial communication/ programming at 9600
baud in monitor mode.
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the ROM difficult for
Freescale Semiconductor
unauthorized users.
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Normal user-mode pin functionality
One pin dedicated to serial communication between monitor ROM and host computer
Standard mark/space non-return-to-zero (NRZ) communication with host computer
Execution of code in RAM or ROM
ROM memory security feature
960 bytes monitor ROM code size ($FC00–$FDFF and $FE10–$FFCE)
Standard monitor mode entry if high voltage, V
MC68HC908JW32 Data Sheet, Rev. 6
(1)
TST
, is applied to IRQ
Figure 7-1
shows an
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