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Product data sheet

Rev. 05 — 16 August 2005

21 of 31

Philips Semiconductors

KMA200

Programmable angle sensor

10.3.2 Command mode

This mode is used for calibration and programming. The KMA200 is controlled with serial

interface commands.

To activate the command mode, the following initialization procedure must be executed

during power-on reset. The pin CS must be constantly held on high level and pin CLK

must be constantly held on low level during power-on. This condition has to start during

reset and must be valid during the following initialization phase of the KMA200 for at least

1ms. CS and CLK are internally weak pull-up so that at least CLK must be actively driven.

If these conditions are valid, the KMA200 starts in command mode. At all other

combinations or if the levels are not constant for the minimum time of 1 ms, the KMA200

starts in normal operation mode.

The normal operation mode is configured with sixteen 16-bit constants stored in the

on-chip EEPROM.

10.3.3 Notes to the programming

The KMA200 sensor is delivered in a pre-calibrated and preprogrammed default

condition.

The EEPROM addresses 0, 1, 5, C, D and E are device dependent and pre-calibrated

for each device. A changing of this contents to another value is not allowed,

because the specified data, influenced by these addresses, are no longer valid.

The EEPROM addresses A and B are used to store production related information. A

changing of these values should not be done.

Definition:

Address A: storage the date code. Date code assembly center: day of the year

(maximum 365) + year (maximum 99)

Address B: storage the assembly lot no. (maximum 65535)

Fig 12. Command mode

006aaa307

CS

max. 3 ms

min. 1 ms

(ASIC internal

Power-On-Reset)

DATA/OUT1

CLK/OUT2