tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 110

• Manufacturer Part Number: tda5235
• Description: Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
• Manufacturer: Infineon Technologies Corporation

Figure 78
Notes:
- Symbol Sync can be activated on any PPx port
- Symbol Sync monitoring necessary only in run mode between frames and WU pattern
or till software timeout generated
Data Sheet
PP0: Write 0xF4 0x07 & Write PPCFG0 0x0E
PP1: Write 0xF4 0x70 & Write PPCFG0 0xE0
PP2: Write 0xF5 0x01 & Write PPCFG1 0x0E
PP3: Write 0xF5 0x10 & Write PPCFG1 0xE0
TSI IRQ
WU IRQ
Interrupt
Parallel Wake-up Search
Write PPCFG0.PP0CFG = 0xE
for other PPx see notes below )
Activate Symbol Sync on PPx
Wait for Wake-up interrupt
Wait for EOM interrupt
Wait for Symbol Sync
Wait for TSI interrupt
Wait for SW Timeout
(example for PP 0;
Write 0xF4 0x07
Wait for interrupt
(if no ISR impl.)
Symbol Sync = 1
(on PPx)
SW Timeout
EOM IRQ
WU IRQ
TSI IRQ
Only necessary if other PPx signals needed during self -polling
otherwise configure PPx once at the beginning
110
1. Force Symbol Sync for MCU to 0
2. Select external processing (for ext. EOM)
3. Generate external EOM
4. Disable external processing
5. Unforce Symbol Sync
Symbol Sync = 0
* Select external processing (for ext. TOTIM)
* Generate external TOTIM
* Disable external processing
Write 0xED 0x40
Write x_CHCFG.EXTPROC = 0x2
Write EXTPCMD 0x01
Write x_CHCFG.EXTPROC = 0x0
Write 0xED 0x00
Deactivate Symbol Sync on PPx
Write PPCFG0.PP0CFG = 0x1
(example for PP 0 = RX_RUN)
or (dependent on application )
TIMEOUT -> SLEEP -> SPM
(Write x_CHCFG.EXTROC = 0x2)
(Write EXTPCMD 0x02)
(Write x_CHCFG.EXTROC = 0x0)
EXT_TOTIM:
Functional Description
EOM generation
- must be faster than
RUNIN duration
V1.0, 2010-02-19
TDA5235