User's Manual

1323x-Modular Reference Board
1323x Development Hardware Reference Manual, Rev. 1.0
3-8 Freescale Semiconductor
Figure 3-5. 1323x-MRB 32 MHz Reference Oscillator Circuit
Figure 3-6. 1323x-MRB 32.768 kHz Optional Oscillator Circuit
3.3 Reset and BDM Debug Port
The reset circuit and BDM port connector are shown in Figure 3-7. See Figure 3-1 for switch and header
locations.
• Reset switch RST2 is active low and provides a hardware reset to the MC1323x
• The 6-pin BDM 2x3 header J10 is provided to connect the MC1323x serial debug port to a standard
HC9S08 debug module.
Figure 3-7. 1323x-MRB Reset Switch and BDM Port
32MHz XTAL
V_IC
V_IC
XTAL_32M
EXTAL_32M
C10
12PF
C10
12PF
C11
12PF
C11
12PF
R24
1K
DNP
R24
1K
DNP
R19
1K
DNP
R19
1K
DNP
R20
1K
DNP
R20
1K
DNP
Y2
32MHZ
Y2
32MHZ
1 4
32
C23
10PF
DNP
C23
10PF
DNP
J8
HDR 1X2
J8
HDR 1X2
1
2
R23
1K
DNP
R23
1K
DNP
32kHz XTAL
MRB-PTA1MRB-PTA0
PTA1/EXTAL_32KPTA0/XTAL_32K
R13 0R13 0
Y1
32.768KHZ
Y1
32.768KHZ
21
C4
12PF
C4
12PF
R10
0
DNP
R10
0
DNP
R11 0R11 0
R12
0
DNP
R12
0
DNP
C5
12PF
C5
12PF
RESET
V_IC
MRB-RSTb
C1
1000pF
C1
1000pF
RST1
SW_MOM
RST1
SW_MOM
12
3 4
R1
15K
R1
15K
BDM
V_IC
BKGD
MRB-RSTb
BH1
125
BH1
125
TL1TL1 BH3
125
BH3
125
J4
HDR 2X3
J4
HDR 2X3
1 2
3 4
65
BH2
125
BH2
125
TL2TL2 BH4
125
BH4
125
TL3TL3