EVB9S12NE64 Freescale Semiconductor, EVB9S12NE64 Datasheet - Page 14

• Manufacturer Part Number: EVB9S12NE64
• Description: KIT EVALUATION FOR NE64
• Manufacturer: Freescale Semiconductor

Specifications of EVB9S12NE64

• Mfg Application Notes: MC9S12NE64 Integrated Ethernet Controller Implementing an Ethernet Interface with the MC9S12NE64 Web Server Development with MC9S12NE64 and Open TCP
• Processor To Be Evaluated: MC9S12NE64
• Data Bus Width: 16 bit
• Interface Type: RS-232, Ethernet
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

E V B 9 S 1 2 N E 6 4
The IRDA port has an optional Shut Down control option that may be enabled by installing the
JP3 option jumper. HCS12 port L6 will provide the shutdown control signal when JP3 is
installed. User application software must provide the shutdown control operation with JP3
installed. IRDA shut down is accomplished by a logic 1 (+3.3V) signal being applied. IRDA is
enabled by default.
LCD PORT1 and 2
The LCD_PORT(S) interface are connected to the HCS12 SPI-0 port and are enabled by
CONFIG Switch position 5 ON. The interface applies a 5Volt level serial shift register to
convert the data to parallel interface for LCD input. This is required due to the fast timing
characteristics of the HCS12 data bus and the slow timing of the standard LCD Modules.
Example LCD Port assembly language driver software is provided on the support CD to
demonstrate typical LCD module operation using this technique.
The interface supports all OPTREX™ DMC series and similar displays with up to 80 characters
in 4 bit bus mode and provides the most common pin configuration for a dual row rear
mounted display connector (LCD_PORT1) or an in-line connector type (LCD_PORT2). Only
one connector maybe applied at a time for LCD connection. The LCD Module is configured in
a Write only mode, it is not possible to read current cursor position or the busy status back
from the module.
The LCD module VEE or contrast potential is adjustable by the CONTRAST potentiometer
between –5V and +5V. The Axiom Mfg. HC-LCD module is compatible for connection to
LCD_PORT1.
LCD_PORT1 Connector
LCD_PORT2 Connector has the same pin number and signal association in a single row
connector.
The LCD write requires 3 SPI transfers. Transfer 1 provides data 0 - 3 and RS (register select)
value. Transfer 2 provides the same data with the EN (D7) bit set. Transfer 3 provides same
data with the EN bit clear.
I2C EEPROM Memory
A 2432 type I2C compatible EEprom is provided on the EVB board for user application. The
EEprom is made available to the 9S12NE64 ports PJ6/SDA and PJ7/SCL pins by the EE_EN
option jumper. Install both option jumpers for EEprom access.
DB1
DB3
DB5
DB7
+5V
RS
EN
10
12
14
2
4
6
8
11
13
1
3
5
7
9
GND
VEE-Contrast
R/W-GND
DB0
DB2
DB4
DB6
SPI data bit definitions to LCD Port:
D0 - D3 = DB4 - 7, LCD data in 4 bit mode.
D4 - D5 = Spare pins S1 and S2, not connected
D6 = RS, 0 = LCD Command, 1 = LCD Data
D7 = EN, 1 = LCD enable.
DB0 -DB3 are not applied and have 10K pull-down resistance.
14
0 5 / 2 4 / 0 4