CDB5461AU Cirrus Logic Inc, CDB5461AU Datasheet - Page 17

• Manufacturer Part Number: CDB5461AU
• Description: Eval Bd Sngl Phase Power/Energy
• Manufacturer: Cirrus Logic Inc

Specifications of CDB5461AU

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: CS5461A
• Primary Attributes: 1-Phase, Energy-to-Frequency Output
• Secondary Attributes: GUI, USB, SPI, Microwire Interfaces
• Processor To Be Evaluated: CS5461A, C8051F320
• Interface Type: USB
• Operating Supply Voltage: 5 V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 598-1552

is (MCLK/K)/16. The pulse duration (t
multiple of MCLK cycles, approximately equal to:
The maximum pulse duration (t
sampling rate and the minimum is defined by the maxi-
mum pulse frequency. The t
The Pulse Width Register (PW) does not affect the nor-
mal format.
5.4.2 Alternate Pulse Format
Setting bits MECH = 1 and STEP = 0 in the Control
Register and ALT = 1 in the Configuration Register con-
figures the E1 and E2 pins for alternating pulse format
output (see
tive-low pulses with a pulse duration (t
the Pulse Width Register (PW):
If MCLK = 4.096 MHz, K = 1, and PW = 1 then
t
DS661F2
PW
E2
E1
= 0.25 ms. To ensure that pulses occur on the E1
E2
E1
...
...
-----------------------------------
(MCLK/K)/16
... ...
...
Figure
1
t
dur
t
PW
(
×
4). Each pin produces alternating ac-
sec
8
(
FREQ
ms
<
)
Positive Energy
≅
t
)
dur
------------------------------------------- -
PulseRateE 1 2
=
E
(
sec
---------------------------------------- -
(MCLK/K)/1024
dur
)
Figure 5. Mechanical Counter Format on E1 and E2
<
dur
PW
limits are:
Figure 4. Alternate Pulse Format on E1 and E2
1
---------------------------------------- -
(MCLK/K)/1024
t
PW
) is determined by the
,
×
dur
8
1
PW
) is an integer
) defined by
×
t
PW
8
FREQ
E
and E2 output pins when full-scale input signals are ap-
plied to the voltage and current channels, then:
The pulse frequency (FREQ
PulseRateE
transfer function. The energy direction is not defined in
the alternate pulse format.
5.4.3 Mechanical Counter Format
Setting bits MECH = 1 and STEP = 0 in the Control
Register and bit ALT = 0 in the Configuration Register
enables E1 and E2 for mechanical counters and similar
discrete counting instruments. When energy is nega-
tive, pulses appear on E2 (see Figure 5). When energy
is positive, the pulses appear on E1. The pulse width is
defined by the Pulsewidth Register and will limit the out-
put pulse frequency (FREQ
samples, if MCLK = 4.096 MHz and K = 1 then
t
PulseRateE
value.
5.4.4 Stepper Motor Format
Setting bits STEP = 1 and MECH = 0 in the Control
Register and bit ALT = 0 in the Configuration Register
configures the E1 and E2 pins for stepper motor format.
When the accumulated active power equals the defined
PW
= 128 ms. To ensure that pulses will occur, the
Negative Energy
1,2
1,2
Register and can be calculated using the
Register must be set to an appropriate
PulseRateE 1 2
,
E
E
). By default, PW = 512
) is determined by the
<
----------- -
t
PW
1
CS5461A
...
...
...
...
17