TSS400-S2

µPOWER PROGRAMMABLE HIGH-PRECISION

SENSOR SIGNAL PROCESSOR

SLMS002 – D4101, OCTOBER 1993

4

POST OFFICE BOX 655303

description (continued)

The TSS400-S2 is designed to meet a wide variety of sensor systems applications including those that require

short time-to-market and rapid and / or frequent programming updates. The TSS400-S2 does not require mask

programming. It can be purchased in any quantity. Typical applications include:

speed, direction, and volume

These sensor systems can be found in many types of applications including home appliances, industrial control

subsystems, HVAC systems and instrumentation, portable instrumentation, consumer products, automotive

products, or where precise ( 12-bit ), ultra-low power ( 12

µA–15 µA typ), intelligent A/D conversion is essential.

The TSS400-S2 is available in two temperature ranges. The TSS400CFN-S2 is characterized for operation from

0

°C to 70°C. The TSS400QFN-S2 is characterized for operation from –40°C to 105°C.

initialization and power up

Initialization is started by hardware in two ways:

oscillator has started operation. This may take from 1 to 6 seconds.

potential.

Table 1 lists the TSS400-S2 register contents after a power up or an INITN-terminal initialization.

Table 1. Register Contents

REGISTER

POWER UP

( COLD START )

INITN TERMINAL

( WARM START )

Program counter ( PC )

000

000

Status bits POS, NEG, and ZERO

undefined

unchanged

RAM contents †

reset to 0

unchanged

Digit latches ( DLn )

reset to 0

reset to 0

K lines’ latch contents

undefined

unchanged

Timers

0

unchanged

ADC voltage SVDD

switched off

switched off

LCD segment latches

undefined

unchanged

Subroutine stack

level 0

level 0

† Despite the RAM remaining unchanged during a warm start, the memory

addressed when INITN is activated may be destroyed by a write cycle.