MC68HC711E9CFNE2 Freescale Semiconductor, MC68HC711E9CFNE2 Datasheet - Page 294

• Manufacturer Part Number: MC68HC711E9CFNE2
• Description: IC MCU 8BIT 512RAM 52-PLC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E9CFNE2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Processor Series: HC711E
• Core: HC11
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 2 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 8
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Application Note
Other
Driving Boot Mode from Another M68HC11
294
series resistor will prevent direct conflict between the internal TxD driver
and the external driver connected to PD1 through the series resistor.
The bootloader firmware sets the DWOM control bit, which configures all
port D pins for wire-OR operation. During the bootloading process, all
port D pins except the PD1/TxD pin are configured as high-impedance
inputs. Any port D pin that normally is used as an output should have a
pullup resistor so it does not float during the bootloading process.
A second M68HC11 system can easily act as the host to drive bootstrap
loading of an M68HC11 MCU. This method is used to examine and
program non-volatile memories in target M68HC11s in Motorola EVMs.
The following hardware and software example will demonstrate this and
other bootstrap mode features.
The schematic in
duplicator for the MC68HC711E9. The circuitry is built in the wire-wrap
area of an M68HC11EVBU evaluation board to simplify construction.
The schematic shows only the important portions of the EVBU circuitry
to avoid confusion. To see the complete EVBU schematic, refer to the
M68HC11EVBU Universal Evaluation Board User’s Manual, Motorola
document order number M68HC11EVBU/D.
The default configuration of the EVBU must be changed to make the
appropriate connections to the circuitry in the wire-wrap area and to
configure the master MCU for bootstrap mode. A fabricated jumper must
be installed at J6 to connect the XTAL output of the master MCU to the
wire-wrap connector P5, which has been wired to the EXTAL input of the
target MCU. Cut traces that short across J8 and J9 must be cut on the
solder side of the printed circuit board to disconnect the normal SCI
connections to the RS232 level translator (U4) of the EVBU. The J8 and
J9 connections can be restored easily at a later time by installing
fabricated jumpers on the component side of the board. A fabricated
Figure 6
shows the circuitry for a simple EPROM
AN1060 — Rev. 1.0
MOTOROLA