User Manual

Table Of Contents

12311-MRB

12311 Development Hardware Reference Manual, Rev. 1

3-2 Freescale Semiconductor

— Regulator bypass jumper option

— Separate external voltage source option

— Power-on green LED

— Jumpers allow various block current measurements

• 6-Pin BDM serial MCU debug port

• MC12311 reset switch

3.1.2 Form Factor

Figure 3-1 shows the 12311-MRB connector and header locations.

Figure 3-1. 12311-MRB

Figure 3-2 shows a footprint of the 12311-MRB with the location of the IO Headers J2 and J3. Users can

create a motherboard to mount the 12311-MRB and headers J2 and J3 are used for that connection.

• Both headers have standard 0.10in / 2.54 mm pin spacing

• J2 is 20-pin and J3 is 18-pin

• Both are pin headers mounted on the bottom side of the 12311-MRB and are intended to plug into

matching receptacles on the motherboard.

BDMport

(J5)

Primary 20‐pinIO

Connector (J15)

Secondary 18‐pinIO

Connector (J14)

RFIOScMA

(J2)

PABoost SMA

(J1)

J13

J12

J11

J10

Reset SW