uzz9000 NXP Semiconductors, uzz9000 Datasheet - Page 8

• Manufacturer Part Number: uzz9000
• Description: Sensor Conditioning Electronics
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Trim interface
mode consists of the two terminals SMODE (pin 10) and
DATA_CLK (pin 9). The structure of this protocol is shown
in Fig.4.
All signal levels at DATA_CLK and SMODE must be
selected according to the requirements listed in Table 3.
The following points must be taken into account with
regard to the asynchronous protocol.
The protocol starts with a falling edge at the SMODE,
Table 3 Definition of the trim interface signals
How to enter the trim mode
The status bits to be transmitted to the UZZ9000 are shown in Table 4. Note that a complete protocol has to be sent
before normal operation can be resumed. The trim mode can also be exited by resetting the device. After entering one
of the trim modes and provided there is a dynamic input signal, a square wave output is visible at the terminal T
(pin 22).
2000 Nov 27
The serial interface used to switch the UZZ9000 into trim
handbook, full pagewidth
UZZ9000 supply voltage
low level of DATA_CLK, SMODE
high level of DATA_CLK, SMODE
rise and fall time of DATA_CLK and SMODE signal
edges (10 to 90% V
DATA_CLK frequency
Sensor Conditioning Electronic
DATA_CLK
(input at pin 9)
SMODE
(input at pin 10)
TOUT
(output at pin 22)
condition
start
DD
PARAMETER
) and (90 to 10% V
1
Fig.4 Protocol used to set UZZ9000 into trim mode.
2
DD
status bit
)
3
8
4
which must occur at a high DATA_CLK level. The following
five bits are used to code the message sent to the
UZZ9000. They are transferred via the SMODE and are
sampled with the rising edge of the DATA_CLK. During the
fifth high level output of DATA_CLK (counted from the start
condition onwards), a rising edge must appear at the
SMODE and the DATA_CLK follows this with one more
change to low level in order to successfully complete the
protocol.
MIN.
4.5
0.1
95
0
8
5
condition
stop
NOM.
5
T1
MAX.
100
5.5
T0
5
1
Product specification
UZZ9000
MHB697
%V
%V
UNIT
MHz
ns
V
OUT
DD
DD