71M6533 Datasheet, PDF (125/132 Pages) Teridian Semiconductor Corporation – Energy Meter IC

FDS_6533_6534_004
71M6533/G/H and 71M6534/H Data Sheet
E_RXTX/SEG9
E_RST/SEG11
E_TCLK/SEG10
I/O 1, 4, 5
I/O
1, 4, 5
Multi-use pins, configurable as either emulator port pins (when
ICE_E pulled high) or LCD SEG drivers (when ICE_E tied to GND).
O 4, 5
ICE_E
ICE enable. When zero, E_RST, E_TCLK, and E_RXTX become
I
2 SEG9, SEG10, and SEG11 respectively. For production units, this
pin should be pulled to GND to disable the emulator port.
CKTEST/SEG19,
MUXSYNC/SEG7
O
Multi-use pins, configurable as either multiplexer/clock output or
4, 5 LCD segment driver using the I/O RAM bits CKOUT_E or
MUX_SYNC_E.
TMUXOUT
OPT_RX/DIO1
OPT_TX/DIO2
O
4
Pin connected to the output test multiplexer. Controlled by
TMUX[3:0].
Multi-use pin, configurable as Optical Receive Input or general DIO.
I/O
3, 4
When configured as OPT_RX, this pin is a regular UART RX pin.
If this pin is unused it must be configured as an output or
terminated to V3P3D or GNDD.
Multi-use pin, configurable as either Optical LED Transmit Output
I/O 3, 4 or general DIO. When configured as OPT_TX, this pin is capable
of directly driving an LED for transmitting data in an IR serial interface.
RESET
RX
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
I
2 chip, this pin should be pulled high. This pin has an internal 30 μA
(nominal) current source pull-down. No external reset circuitry is
necessary.
I
3
UART input. If this pin is unused it must be terminated to
V3P3D or GNDD.
TX
TEST
PB
O
4 UART output.
I
7
Enables Production Test.
This pin must be grounded in normal operation.
Push button input. This pin must be at GNDD when not active or
I
3
unused. A rising edge sets the IE_PB flag. It also causes the part to
wake up if it is in SLEEP or LCD mode. PB does not have an internal
pull-up or pull-down resistor.
Pin types: P = Power, O = Output, I = Input, I/O = Input/Output.
The circuit number denotes the equivalent circuit, as specified in Section 6.9.4.
Rev 2
125