MOTOROLA
Analog Signal Processor (ASP)
15-1
Chapter 15
Analog Signal Processor (ASP)
The analog signal processor (ASP) module of the MC9328MX1 consists of an ADC for touch panel input,
and a CODEC (both ADC and DAC) for voice input/output.
15.1 Features
The ASP modules offers the following features:
•
9-bit PADC for touch panel and low voltage detection
•
On-chip voltage reference for ADC
•
12
×
16-bit FIFO for PADC sample
•
Embedded touch panel circuitry
•
Supports auto and manual sampling mode
•
Programmable pen down and pen-up interrupt to interrupt handler
•
Provides data-ready and FIFO-full interrupt to interrupt handler
•
True differential input
•
Support for temperature compensation by software
15.2 ASP Signal Description
The ASP system block diagram shown in Figure 15-1 illustrates the operation of the individual modules
that comprise the ASP.
Figure 15-1. ASP System Block Diagram
SWITCH CNRL
and
INPUT SELECT
LOGIC
INPUT SELECT
PADC
SWITCH
CIRCUIT
PX2
PX1
PY1
PY2
From Touch
Panel
Voltage
Detect
U
X
Y
PEN SAMPLE REG (12X16-bit)
COMPARE CONTROL REG
SAMPLE RATE CTRL REG
PEN CONTROL REGISTER
pen_data_int
touch_int
comp_int
Uip, Uin
For Touch Interrupt Generation
pen_up_int
INTERRUPT
GENERATOR
Summary of Contents for DragonBall MC9328MX1
Page 68: ...1 12 MC9328MX1 Reference Manual MOTOROLA Introduction ...
Page 86: ...2 18 MC9328MX1 Reference Manual MOTOROLA Signal Descriptions and Pin Assignments ...
Page 116: ...3 30 MC9328MX1 Reference Manual MOTOROLA Memory Map ...
Page 126: ...4 10 MC9328MX1 Reference Manual MOTOROLA ARM920T Processor ...
Page 160: ...8 8 MC9328MX1 Reference Manual MOTOROLA System Control ...
Page 272: ...13 32 MC9328MX1 Reference Manual MOTOROLA DMA Controller ...
Page 281: ...Programming Model MOTOROLA Watchdog Timer Module 14 9 ...
Page 282: ...14 10 MC9328MX1 Reference Manual MOTOROLA Watchdog Timer Module ...
Page 300: ...15 18 MC9328MX1 Reference Manual MOTOROLA Analog Signal Processor ASP ...
Page 438: ...18 16 MC9328MX1 Reference Manual MOTOROLA Serial Peripheral Interface Modules SPI 1 and SPI 2 ...
Page 478: ...19 40 MC9328MX1 Reference Manual MOTOROLA LCD Controller ...
Page 574: ...21 32 MC9328MX1 Reference Manual MOTOROLA Memory Stick Host Controller MSHC Module ...
Page 598: ...23 16 MC9328MX1 Reference Manual MOTOROLA Real Time Clock RTC ...
Page 670: ...24 72 MC9328MX1 Reference Manual MOTOROLA SDRAM Memory Controller ...
Page 726: ...25 56 MC9328MX1 Reference Manual MOTOROLA SmartCard Interface Module SIM ...
Page 736: ...26 10 MC9328MX1 Reference Manual MOTOROLA General Purpose Timers ...
Page 854: ...29 18 MC9328MX1 Reference Manual MOTOROLA I2C Module ...
Page 900: ...30 46 MC9328MX1 Reference Manual MOTOROLA Synchronous Serial Interface SSI ...
Page 942: ...32 26 MC9328MX1 Reference Manual MOTOROLA GPIO Module and I O Multiplexer IOMUX ...