ST20-GP6 datasheet(114/123 Pages) STMICROELECTRONICS

114 / 123 page

ST20-GP6

114/123

21 Pin list

Signals names are preﬁxed by

not if they are active low, otherwise they are active high.

Supplies

Interrupts

Memory

Low power controller and real time clock

In/Out

Function

VDD

Power supply

GND

Ground

RTCVDD

Real time clock and battery-backed SRAM supply

Table 21.1 ST20-GP6 supply pins

In/Out

Function

Interrupt0-1

Interrupts

Table 21.2 ST20-GP6 interrupt pins

In/Out

Function

MemAddr1-19

out

Address bus

MemData0-15

in/out

Data bus.

Data0 is the least significant bit (LSB) and

Data15 is the most signiﬁcant bit (MSB).

MemWait

Memory cycle extender

MemReadnotWrite

out

Indicates if current access is a read or a write

notMemOE

out

Output enable strobe

notMemCE0-3

out

Chip enable strobes – one per bank

notMemBE0-1

out

Used as byte enable, or

MemAddr0 on 8-bit bus

BusWidth

Selects 8 or 16-bit bus at reset

Table 21.3 ST20-GP6 memory pins

In/Out

Function

LowPowerClockIn

Low power input clock

LowPowerClockOsc

in/out

Low power clock oscillator

LowPowerStatus

out

Low power status

notWdReset

out

Watchdog timer reset

WdEnable

Watchdog timer enable

Table 21.4 ST20-GP6 low power controller and real time clock pins

ST20-GP6 Datasheet(PDF) 114 Page - STMicroelectronics

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