71M6533 Datasheet, PDF (119/124 Pages) Teridian Semiconductor Corporation – Energy Meter IC

FDS_6533_6534_004
71M6533/71M6534 Data Sheet
Name
E_RXTX/SEG9
E_RST/SEG11
Type Cicuit Description
I/O 1, 4, 5 Multi-use pins, configurable as either emulator port pins (when
I/O 1, 4, 5 ^{ICE_E pulled high) or LCD SEG drivers (when ICE_E tied to GND).}
E_TCLK/SEG10 O 4, 5
ICE_E
I
2 ICE enable. When zero, E_RST, E_TCLK, and E_RXTX become
SEG9, SEG10, and SEG11 respectively. For production units, this
pin should be pulled to GND to disable the emulator port.
CKTEST/SEG19, O
MUXSYNC/SEG7
4, 5 Multi-use pins, configurable as either multiplexer/clock output or
LCD segment driver using the I/O RAM registers CKOUT_E or
MUX_SYNC_E.
TMUXOUT
O
4 Pin connected to the output test multiplexer. Controlled by
TMUX[3:0].
OPT_RX/DIO1
I/O 3, 4 Multi-use pin, configurable as Optical Receive Input or general DIO.
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 termi-
nated to V3P3D or GNDD.
OPT_TX/DIO2
I/O 3, 4 Multi-use pin, configurable as either Optical LED Transmit Output
or general DIO. When configured as OPT_TX, this pin is capable
of directly driving an LED for transmitting data in an IR serial inter-
face.
RESET
I
2 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
(nominal) current source pull-down. No external reset circuitry is
necessary.
RX
I
3 UART input. If this pin is unused it must be terminated to
V3P3D or GNDD.
TX
O
4 UART output.
TEST
I
7 Enables Production Test.
This pin must be grounded in normal operation.
PB
I
3 Push button input. This pin must be at GNDD when not active or un-
used. 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 5.9.4.
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