TXC-03305AIPQ Transwitch Corporation, TXC-03305AIPQ Datasheet - Page 40

• Manufacturer Part Number: TXC-03305AIPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-03305AIPQ

• Lead Free Status / RoHS Status: Not Compliant

TXC-03305-MB
Ed. 4, September 2000
M13X
TXC-03305
M13XID0 bit is used by external software to determine if the device being accessed contains an M13E or an
M13X die. The end user would use this bit as follows before the device is configured:
RESETS
An active low hardware reset signal lead, HRESET, is provided to reset the M13X device from an external
source. The operation of this lead is also asynchronous. When this lead is asserted low the following functions
occur:
Please note that the hardware reset does not have any effect on the boundary scan TAP controller.
Figure 19 shows the functional architecture of the resets in the M13X device. Please note that this diagram rep-
resents functionality and not necessarily implementation.
• Register 10H is written with 00H
• The end user verifies that 10H contains 00H
• Register 10H is written with 80H
• The end user reads 10H again. If it is 00H, then the device contains an M13X die. If 80H is read back,
• As an additional check to ensure that the microprocessor interface is working, the end user can verify
• Reset registers 00H, 02H-14H, and 16H-3FH to 00H.
• Reset register 01H to 01H.
• Reset register 15H to 7FH.
• Perform the same reset functions as the software reset of register 1FH.
• Reset all of the device to a known state.
then the device contains an M13E die.
that bit 7 of register 11H can be written with a 1 and a 0. This bit does not do anything in either device,
it is just a read/write bit.
HRESET
Lead
Lead
TRS
Note: Low corresponds to logic 0 in this diagram.
Figure 19. M13X Reset Structure
DATA SHEET
Software Reset
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Active Low Signal
Reset for system logic
Reset for TAP Controller
(active low)
(active low)
&
function of M13X device
Software Reset
(active low)