Datasheet

ADuC7128/ADuC7129
Rev. 0 | Page 19 of 92
Pin
No. Mnemonic Type
1
Description
17 P4.6/SPM10/AD14 I/O General-Purpose Input and Output Port 4.6/Serial Port Mux Pin 10/External Memory AD14.
18 P4.7/SPM11/AD15 I/O General-Purpose Input and Output Port 4.7/Serial Port Mux Pin 11/External Memory AD15.
19
P0.0/BM
/CMP
OUT
/MS0
I/O
General-Purpose Input and Output Port 0.0 /Boot Mode. The ADuC7129 enters download
mode if BM
is low at reset and executes code if BM is pulled high at reset through a 1 kΩ
resistor/voltage comparator output/external memory MS0.
20
P0.6/T1/MRST
O General-Purpose Output Port 0.6/Timer1 Input/Power-On Reset Output/External Memory AE.
21 TCK I JTAG Test Port Input, Test Clock. Debug and download access.
22
TDO/P0.2/BHE
O
JTAG Test Port Output, Test Data Out. Debug and download access/general-purpose input
and output Port 0.2/External Memory BHE
.
23, 53, 67 IOGND S Ground for GPIO. Typically connected to DGND.
24, 54 IOV
DD
S 3.3 V Supply for GPIO and Input of the On-Chip Voltage Regulator.
25 LV
DD
S
2.5 V Output of the On-Chip Voltage Regulator. Must be connected to a 0.47 μF capacitor
to DGND.
26 DGND S Ground for Core Logic.
27 P3.0/PWM1/AD0 I/O General-Purpose Input and Output Port 3.0/PWM1 Output/External Memory AD0.
28 P3.1/PWM2/AD1 I/O General-Purpose Input and Output Port 3.1/PWM2 Output/External Memory AD1.
29 P3.2/PWM3/AD2 I/O General-Purpose Input and Output Port 3.2/PWM3 Output/External Memory AD2.
30 P3.3/PWM4/AD3 I/O General-Purpose Input and Output Port 3.3/PWM4 Output//External Memory AD3.
31 P2.4/MS0 I/O General-Purpose Input and Output Port 2.4/Memory Select 0.
32
P0.3/ADC
BUSY
/TRST/A16
I/O
General-Purpose Input and Output Port 3.3/ADC
BUSY
Signal/JTAG Test Port Input, Test Reset.
Debug and download access/External Memory A16.
33 P2.5/MS1 I/O General-Purpose Input and Output Port 2.5/Memory Select 1.
34 P2.6/MS2 I/O General-Purpose Input and Output Port 2.6/Memory Select 2.
35
RST
I Reset Input (Active Low).
36 P3.4/PWM5/AD4 I/O General-Purpose Input and Output Port 3.4/PWM5 Output/External Memory AD4.
37 P3.5/PWM6/AD5 I/O General-Purpose Input and Output Port 3.5/PWM6 Output/External Memory AD5.
38
P0.4/IRQ0/CONVST
/MS1
I/O
General-Purpose Input and Output Port 0.5/External Interrupt Request 0, Active High/Start
Conversion Input Signal for ADC/External Memory MS1.
39 P0.5/IRQ1/ADC
BUSY
I/O
General-Purpose Input and Output Port 0.6/External Interrupt Request 1, Active
High/ADC
BUSY
Signal.
40 P2.0/SPM9 I/O General-Purpose Input and Output Port 2.0/Serial Port Mux Pin 9.
41 P0.7/SPM8/ECLK/XCLK I/O
General-Purpose Input and Output Port 0.7/Serial Port Mux Pin 8/Output for the External
Clock Signal/Input to the Internal Clock Generator Circuits.
42 XCLKO O Output from the Crystal Oscillator Inverter.
43 XCLKI I Input to the Crystal Oscillator Inverter and Input to the Internal Clock Generator Circuits.
44 PV
DD
S
2.5 V PLL Supply. Must be connected to a 0.1 μF capacitor to DGND. Should be connected
to 2.5 V LDO output.
45 DGND S Ground for PLL.
46 P3.6/AD6 I/O General-Purpose Input and Output Port 3.6/External Memory AD6.
47 P3.7/AD7 I/O General-Purpose Input and Output Port 3.7/External Memory AD7.
48 P2.7/MS3 I/O General-Purpose Input and Output Port 2.7/Memory Select 3.
49
P2.1/WS
I/O General-Purpose Input and Output Port 2.1/Memory Write Select.
50
P2.2/RS
I/O General-Purpose Input and Output Port 2.1/Memory Read Select.
51 P1.7/SPM7 I/O General-Purpose Input and Output Port 1.7/Serial Port Mux Pin 7.
52 P1.6/SPM6 I/O General-Purpose Input and Output Port 1.6/Serial Port Mux Pin 6.
55 P4.0/S1/AD8 I/O General-Purpose Input and Output Port 4.0/Quadrature Input 1/External Memory AD8.
56 P4.1/S2/AD9 I/O General-Purpose Input and Output Port 4.1/Quadrature Input 2/External Memory AD9.
57 P1.5/SPM5 I/O General-Purpose Input and Output Port 1.5/Serial Port Mux Pin 5.
58 P1.4/SPM4 I/O General-Purpose Input and Output Port 1.4/Serial Port Mux Pin 4.
59 P1.3/SPM3 I/O General-Purpose Input and Output Port 1.3/Serial Port Mux Pin 3.
60 P1.2/SPM2 I/O General-Purpose Input and Output Port 1.2/Serial Port Mux Pin 2.
61 P1.1/SPM1 I/O General-Purpose Input and Output Port 1.1/Serial Port Mux Pin 1.
62 P1.0/SPM0 I/O General-Purpose Input and Output Port 1.0/Serial Port Mux Pin 0.