AD Converters for Display Functions
? 3x Sigma Delta ADC for Black Current, EHT, Beam Current Limiting measurement Clock frequency
54MHz
Deflection & Geometry
? Horizontal time base for display based on digital PLL
? Very good jitter performance of about. +/ - 300 ps of the horizontal drive pulse
? Low power start -up mode from standby
? Slow start/stop
? Fixed beam -current switch-off
? Vertical and horizontal geometry processing. Special features of the horizontal geometry processor
are:
- inner-pincushion correction
- horizontal non-linearity correction
? Auxiliary output
- can be used to generate waveform with frequency of vertical deflection (for example quadrupole
correction for flat picture tubes)
? Vertical guard input
? Flash detection input
? EHT overvoltage protection (X -Ray) input
? Horizontal drive output
Microprocessor
? TV control by embedded 32 bit RISC processor
- Philips MIPS PR1910, 54MHz
? Cache Structure
- Unified 8Kbyte Instruction/Data Cache
? Co-Processor:
- 2x 32bit system clock Count/Compare (Timer1,2) Registers
- 1x 32bit system clock Count/Compare (Timer3) configurable as Watchdog Timer
? Debug Support:
- MIPS JTAG compliant
- Software / Hardware Breakpoint
- Single Stepping
- Real Time Trace
TV Control Peripherals
? General Purpose IO (GPIO):
- 32 total GPIO pins, 28 with secondary functions stated bellow (4 GPIO free pins)
? Two I 2 C Interface units
? Two General Purpose Counter/Compare (Timer) units
? Universal Asynchronous Receiver Transmitter (UART)
? Eight external interrupts
? Analogue to Digital converter:
- 6 multiplexed inputs
- Programmable resolution of up to 10 bits
? Remote Control Receiver and Transmitter
Reset
? Reset via external input
Internal Memory for SW Code /Data
? Data/ Code memory up to 128 Kbytes (SRAM)
Memory at SDRAM Interface
? Addressable space up to 32Mbyte (SDRAM only, no SRAM, no DDRAM)
- 16Mbit (1M x 16) Single data rate SDRAM
? Memory Functions:
- PIP/DW, DNR, Scan Convers ion, requiring at least 13Mbit
- PIP replay, scalable size
24
AK53 D.O.C. Service Manual 22/03/2004 |
ACEC
