Datasheet
UCD3138
www.ti.com
SLUSAP2F –MARCH 2012–REVISED NOVEMBER 2013
Table 2-1. Pin Functions (continued)
ALTERNATE ASSIGNMENT
CONFIGURABLE
PIN NAME PRIMARY ASSIGNMENT
AS A GPIO?
NO. 1 NO. 2 NO. 3
18 DPWM0B DPWM 0B output Yes
19 DPWM1A DPWM 1A output Yes
20 DPWM1B DPWM 1B output Yes
21 DPWM2A DPWM 2A output Yes
22 DPWM2B DPWM 2B output Yes
23 DPWM3A DPWM 3A output Yes
24 DPWM3B DPWM 3B output Yes
25 DGND Digital ground
ADC_EXT_TRI
26 SYNC DPWM Synchronize pin TCAP PWM0 Yes
G
27 PMBUS_ALERT PMBus Alert (Open Drain) Yes
28 PMBUS_CTRL PMBus Control (Open Drain) Yes
PMBUS_ALER
29 SCI_TX1 SCI TX 1 Yes
T
30 SCI_RX1 SCI RX 1 PMBUS_CTRL Yes
31 PWM0 General purpose PWM 0 Yes
32 PWM1 General purpose PWM 1 Yes
33 DGND Digital ground
34 INT_EXT External Interrupt Yes
35 FAULT0 External fault input 0 Yes
36 FAULT1 External fault input 1 Yes
37 TCK JTAG TCK (For manufacturer test only) TCAP SYNC PWM0 Yes
PMBUS_ALER
38 TDO JTAG TDO (For manufacturer test only) SCI_TX0 FAULT0 Yes
T
39 TDI JTAG TDI (For manufacturer test only) SCI_RX0 PMBUS_CTRL FAULT1 Yes
40 TMS JTAG TMS (For manufacturer test only) Yes
41 TCAP Timer capture input Yes
42 FAULT2 External fault input 2 Yes
43 FAULT3 External fault input 3 Yes
44 DGND Digital ground
45 V33DIO Digital I/O 3.3V core supply
46 BP18 1.8V Bypass
47 V33D Digital 3.3V core supply
48 AGND Substrate analog ground
49 AGND Analog ground
50 EAP0 Channel #0, differential analog voltage, positive input
51 EAN0 Channel #0, differential analog voltage, negative input
52 EAP1 Channel #1, differential analog voltage, positive input
53 EAN1 Channel #1, differential analog voltage, negative input
Channel #2, differential analog voltage, positive input
54 EAP2
(Recommended for peak currrent mode control)
55 EAN2 Channel #2, differential analog voltage, negative input
56 AGND Analog ground
57 V33A Analog 3.3V supply
58 AD00 12-bit ADC, Ch 0, Connected to current source
59 AD01 12-bit ADC, Ch 1, Connected to current source
60 AD02 12-bit ADC, Ch 2, Connected to comparator A, I-share
61 AD05 12-bit ADC, Ch 5
62 AD08 12-bit ADC, Ch 8
63 AD09 12-bit ADC, Ch 9
64 AD11 12-bit ADC, Ch 11
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