TXC-06312BIOG Transwitch Corporation, TXC-06312BIOG Datasheet - Page 91

• Manufacturer Part Number: TXC-06312BIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06312BIOG

• Lead Free Status / Rohs Status: Supplier Unconfirmed

9 1 o f 2 0 2
10.3 RESET
10.2.2 Loss of Clock Detection
10.3.1 External Lead Controlled Hardware Reset
10.3.2 Microprocessor Controlled Hardware Reset (RESETH)
10.3.3 Microprocessor Controlled Reset Per Clock Domain
All clocks, except the microprocessor clock, are monitored for Loss of Clock. The clock to be
monitored is divided by LocDivider + 1.
Loss of Clock is detected as follows:
Note: The Loss of Clock detector can only operate correctly if the optical transceiver
generates a constant output (no transitions) on the receive side when there is no valid
incoming optical signal.
Hardware Reset (Active Low): The use of this lead at power-up is mandatory. Holding this
lead low for at least 50ns causes all the registers in the device to be reset.
When written with the value 0x91H all registers in the device will be reset but with a few
exceptions.
The registers in the following blocks will not be reset:
These are the registers that operate in the microprocessor clock domain.
There are 5 major interfaces. For each of these there is a separate microprocess controlled
reset available. Reset is activated by writing the value 0x91 H to the corresponding register.
These software resets may only be asserted when RESETH is equal to 0x91. They may be
deasserted at anytime.
• Entry: when LOC_EntryThreshold microprocessor clock cycles have passed without
• Exit: when LOC_ExitThreshold transitions are detected the divided clock
transitions on the divided clock to be monitored.
• Microprocessor interface
• Global control
• Reset generator
• Interrupt
• Clock recovery / clock synthesis / SerDes
• JTAG Master
• AddCombus_Reset: Reset in the Add Combus clock domain
• RxLine1_Reset ... RxLine4_Reset: Reset in the RxLine 1 ... 4 clock domain
- Operation -
PRELIMINARY TXC-06312B-MB, Ed. 2
PHAST-12N Device
DATA SHEET
TXC-06312B
June 2005