CY8C3866LTI-064 Cypress Semiconductor Corp, CY8C3866LTI-064 Datasheet - Page 58

• Manufacturer Part Number: CY8C3866LTI-064
• Description: CY8C3866LTI-064
• Manufacturer: Cypress Semiconductor Corp
• Series: PSOC™ 3 CY8C38xxr

Specifications of CY8C3866LTI-064

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 67MHz
• Connectivity: EBI/EMI, I²C, LIN, SPI, UART/USART
• Peripherals: CapSense, DMA, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.71 V ~ 5.5 V
• Data Converters: A/D 2x20b, D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 8-3. Bandwidth
Figure 8-9. PGA Resistor Settings
The PGA is used in applications where the input signal may not
be large enough to achieve the desired resolution in the ADC, or
dynamic range of another SC/CT block such as a mixer. The gain
is adjustable at runtime, including changing the gain of the PGA
prior to each ADC sample.
8.5.4 TIA
The Transimpedance Amplifier (TIA) converts an internal or
external current to an output voltage. The TIA uses an internal
feedback resistor in a continuous time configuration to convert
input current to output voltage. For an input current Iin, the output
voltage is Iin x Rfb +V
non inverting input. The feedback resistor Rfb is programmable
between 20 KΩ and 1 MΩ through a configuration register.
Table 8-4
configuration settings.
Table 8-4. Feedback Resistor Settings
Document Number: 001-11729 Rev. *R
V
V
V
V
S
in
ref
ref
in
Configuration Word
Gain
24
48
50
1
0
1
0
1
shows the possible values of Rfb and associated
000b
001b
010b
100b
101b
011b
110b
111b
20 k or 40 k
R1
REF
, where V
Bandwidth
6.0 MHz
340 kHz
220 kHz
215 kHz
Nominal R
REF
R2
is the value placed on the
1000
20 k to 980 k
120
250
500
20
30
40
60
fb
(
KΩ
)
Figure 8-10. Continuous Time TIA Schematic
The TIA configuration is used for applications where an external
sensor's output is current as a function of some type of stimulus
such as temperature, light, magnetic flux etc. In a common
application, the voltage DAC output can be connected to the
V
current by adjusting the voltage DAC output voltage.
8.6 LCD Direct Drive
The PSoC LCD driver system is a highly configurable peripheral
designed to allow PSoC to directly drive a broad range of LCD
glass. All voltages are generated on chip, eliminating the need
for external components. With a high multiplex ratio of up to 1/16,
the CY8C38 family LCD driver system can drive a maximum of
736 segments. The PSoC LCD driver module was also designed
with the conservative power budget of portable devices in mind,
enabling different LCD drive modes and power down modes to
conserve power.
PSoC Creator provides an LCD segment drive component. The
component wizard provides easy and flexible configuration of
LCD resources. You can specify pins for segments and
commons along with other options. The software configures the
device to meet the required specifications. This is possible
because of the programmability inherent to PSoC devices.
Key features of the PSoC LCD segment system are:
V ref
REF
LCD panel direct driving
Type A (standard) and Type B (low-power) waveform support
Wide operating voltage range support (2 V to 5 V) for LCD
panels
Static, 1/2, 1/3, 1/4, 1/5 bias voltage levels
Internal bias voltage generation through internal resistor ladder
Up to 62 total common and segment outputs
Up to 1/16 multiplex for a maximum of 16 backplane/common
outputs
Up to 62 front plane/segment outputs for direct drive
Drives up to 736 total segments (16 backplane × 46 front plane)
Up to 64 levels of software controlled contrast
Ability to move display data from memory buffer to LCD driver
through DMA (without CPU intervention)
Adjustable LCD refresh rate from 10 Hz to 150 Hz
Ability to invert LCD display for negative image
Three LCD driver drive modes, allowing power optimization
I in
TIA input to allow calibration of the external sensor bias
PSoC
R fb
®
3: CY8C38 Family
Data Sheet
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V out
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