78M6631 Maxim, 78M6631 Datasheet - Page 27

• Manufacturer Part Number: 78M6631
• Description: The Teridian™ 78M6631 is a highly integrated 3-phase power measurement and monitoring system-on-chip (SoC), with a 10MHz 8051-compatible MPU core and Single Converter Technology® containing a 22-bit deltasigma converter and 32-bit compute e
• Manufacturer: Maxim

4.3
Pin types: P = Power, O = Output, I = Input, I/O = Input/Output.
The circuit number denotes the equivalent circuit, as specified in Section 5, I/O Equivalent Circuits.
Rev 1
DIO3
DIO4,DIO5,DIO6
DIO8, DIO9, DIO11
DIO17
DIO24, DIO25
DIO29, DIO30
DIO45, DIO47
DIO51, DIO53
DIO55
D/Y
PCLK
PSDO
PCSZ
PSDI
E_RXTX
E_RST
E_TCLK
ICE_E
CKTEST
TMUXOUT
RESET
RX
TX
GNDD (pin 55)
Name
Digital Pins
Type Circuit
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
I
I
I
I
I
3, 4, 5 Multi-use pins, DIO.
3, 4, 5 SPI PORT.
1, 4, 5 Port pins (when ICE_E pulled high).
1, 4, 5
3, 4
4, 5
3, 4
–
2
4
2
3
4
7
Dedicated DIO pin.
(DIO4 = SCK, DIO5 = SDA when configured as EEPROM
interface; If unused, these pins must be configured as DIOs
and set to outputs by the firmware.
Selects either the Delta or the Wye configuration.
ICE enable. When zero, E_RST, E_TCLK and E_RXTX SEG32
For production units, this pin should be pulled to GND to disable
the emulator port.
Test clock.
Digital test multiplexer output. Controlled by TMUX[3:0].
Chip reset: This input pin is used to reset the chip into a known
state. For normal operation, this pin is pulled low. To reset the
chip, this pin should be pulled high. This pin has an internal
30 µA (typ) current source pulldown. No external reset circuitry is
necessary.
UART input. If this pin is unused, it must be terminated to
V3P3D or GNDD.
UART output.
Enables Production Test. This pin must be grounded in normal
operation.
Table 20: Digital Pins
Description
27