MC68HC908JB8JDW Freescale Semiconductor, MC68HC908JB8JDW Datasheet - Page 163

• Manufacturer Part Number: MC68HC908JB8JDW
• Description: IC MCU 8K FLASH 3MHZ 20-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JB8JDW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 3MHz
• Connectivity: USB
• Peripherals: LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Technical Data — MC68HC908JB8•MC68HC08JB8•MC68HC08JT8
10.1 Contents
10.2 Introduction
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
10.2
10.3
10.4
10.4.1
10.4.2
10.4.3
10.4.4
10.4.5
10.4.6
10.5
This section describes the monitor ROM (MON) and the monitor mode
entry methods. The monitor ROM allows complete testing of the MCU
through a single-wire interface with host computer. This mode is also
used for programming and erasing of FLASH memory in the MCU.
Monitor mode entry can be achieved without use of the higher voltage,
V
thus reducing the hardware requirements for in-circuit programming.
DD
+ V
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .164
HI
Entering Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169
Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Echoing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Break Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
, as long as vector addresses $FFFE and $FFFF are blank,
Monitor ROM (MON)
Section 10. Monitor ROM (MON)
Technical Data
163