EVB51JM128 Freescale Semiconductor, EVB51JM128 Datasheet - Page 13

• Manufacturer Part Number: EVB51JM128
• Description: BOARD EVAL FOR MCF51JM128 MCU
• Manufacturer: Freescale Semiconductor
• Series: ColdFire®r
• Type: MCUr

Specifications of EVB51JM128

• Contents: Evaluation Board
• Silicon Manufacturer: Freescale
• Core Architecture: Coldfire
• Core Sub-architecture: Coldfire V1
• Silicon Core Number: MCF51J
• Silicon Family Name: Flexis - MCF51JM
• Rohs Compliant: Yes
• For Use With/related Products: MCF51JM128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

E V B 5 1 J M 1 2 8
PLL settings are under user application control and may be changed during application execu-
tion.
Communications
The EVB51JM128 board provides 2 UART ports, 1 IIC port, and 1 USB OTG port. RS-232
communication is supported through UART[2:0] connectors and through the MCU_PORT con-
nector. IIC communications are supported solely through the MCU_PORT connector. The
COM_EN option header enables SCI functionality between the MCU and the associated
UARTx connector. The COM_EN option header also enables serial communications through
the integrated USB BDM.
COM Ports
An RS-232 transceiver provides RS-232 to TTL/CMOS logic level translation between the
UARTx connector and the MCU. The transceiver provides full RS-232 signaling at input volt-
age level between 3.0V and 5.0V. The COMx connector is a 9-pin Dsub, right-angle connec-
tor. A ferrite bead on shield ground provides conducted immunity protection. Communication
signals TXDx, RXDx are routed from the transceiver to the MCU. These signals are also avail-
able at the MCU_PORT connector. Handshake signals RSTx and CTSx are not available.
COM_EN
The COM_EN option header individually connects and disconnects UARTx signals between
the MCU and the SCI transceiver. Removing a shunt disconnects the associated signal. In-
stalling a shunt connects the associated signal.
Figure 6: UARTx_EN Option Header
(*) – Indicates default condition
NOTE: TGT_TXD and TGT_RXD connect TXD2 and RXD2 lines to the serial input of the inte-
grated BDM.
▪
▪
▪
▪
▪
▪
U S E R
▪
▪
▪
▪
▪
▪
TGT_TXD
TGT_RXD
TXD1
RXD1
TXD2
RXD2
G U I D E
Enabled (*)
Enabled (*)
Enabled (*)
Enabled (*)
Enabled
Enabled
On
12
Shunt
Disabled (*)
Disabled (*)
Disabled
Disabled
Disabled
Disabled
Off
F E B R U A R Y
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