Table of Contents
17. Input/Ouput Circuitry
17.1 Control Pins
The input/output circuitries of the TMP86PM29BUG control pins are shown below.
Control Pin
I/O
XIN
Input
XOUT
Output
XTIN
Input
XTOUT
Output
I/O
RESET
TEST
Input
Note: The TEST pin of the TMP86PM29 does not have a pull-down resistor and protect diode(D1). Fix the TEST pin at low-level
in MCU mode.
Input/Output Circuitry
Osc. enable
VDD
Rf
XIN
XTEN
Osc. enable
VDD
Rf
R
XTIN
XTOUT
Address-trap-reset
Watchdog-timer
System-clock-reset
R
Page 175
fc
Resonator connecting pins
VDD
(High-frequency)
R
O
XOUT
fs
Resonator connecting pins
VDD
(Low-frequency)
R
O
DD
R
IN
Sink open drain output
Hysteresis input
Pull-up resistor
Without pull-down resistor
Fix the TEST pin at low-level in MCU
mode
TMP86PM29BUG
Remarks
R
= 1.2 MΩ (typ.)
f
R
= 1 kΩ (typ.)
O
R
= 6 MΩ (typ.)
f
R
= 220 kΩ (typ.)
O
R
= 220 kΩ (typ.)
IN
R = 100 Ω (typ.)
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