MSP430x31x
MIXED SIGNAL MICROCONTROLLERS
SLAS165D − FEBRUARY 1998 − REVISED APRIL 2000
26
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
•
HOUSTON, TEXAS 77251−1443
TYPICAL CHARACTERISTICS
typical input/output schematics
COM0 − 3
VC
VD
Control COM0 − 3
VA
VB
Segment control
VA
VB
Segment control
LCDCTL (LCDM5,6,7)
Data (LCD RAM bits 0−3
or bits 4 − 7)
S0, S1
S2/O2−Sn/On
LCD OUTPUT (COM0 − 4, Sn, Sn/On)
NOTE: The signals VA, VB, VC, and VD come from the LCD module analog voltage generator.
JTAG Fuse
Blow
Control
TDI/VPP
TDO/TDI
TMS
JTAG
Fuse
VPP_ Internal
TDI_ Internal
TDO/TDI_Control
TDO_ Internal
From/To JTAG_CBT_SIG_REG
NOTES: A. During programming activity and when blowing the JTAG enable fuse, the TDI/VPP terminal is used to apply the correct voltage
source. The TDO/TDI terminal is used to apply the test input data for JTAG circuitry.
B. The TDI/VPP terminal of the ’P31x and ’E31x does not have an internal pullup resistor. An external pulldown resistor is
recommended to avoid a floating node, which could increase the current consumption of the device.
C. The TDO/TDI terminal is in a high-impedance state after POR. The ’P31x and ’E31x need a pullup or a pulldown resistor to avoid
floating a node, which could increase the current consumption of the device.
Figure 9. MSP430P313/E313/P315(S)/E315: TDI/VPP, TDO/TDI