13
Signal name
Pin #
Type(I/O)
Signal description
INT
86
O (T/S)
INTERRUPT:
Configurable interrupt output. Refer to
Table 18 for a detailed description of how INT is configured.
In open-drain configurations, an external pull-up is required.
In open-source configurations, an external pull-down is
required.
To prevent undesired interrupts before configuration is
complete, microprocessors with an active-high interrupt pin
should have a pull-down and those with an active-low interrupt
pin, a pull-up.
RDB
55
I
READ ENABLE:
Active low.
RDYB
53
I/O
READY:
RDYB is an active-low output to acknowledge the
end of data transfer. This pin is briefly driven to its inactive state
before being tristated.
Refer to microprocessor application notes for board pull-up
requirements.
RSTB
85
I
RESET:
Active low input to reset the HDMP-3001.
WRB
54
I
WRITE ENABLE:
Active low.
Signal name
Pin #
Type(I/O)
Signal description
TCK
7
I
TEST CLOCK:
JTAG input clock used to sample data on the
TDI and TDO pins. Should be tied high when the JTAG interface
is not in use.
TDI
8
I (Int PU)
TEST DATA IN:
Input pin for serial data stream to be sent to
HDMP-3001. TDI is sampled on the rising edge of TCK.
TDO
6
O
TEST DATA OUT:
Output pin for serial data stream sent
from the HDMP-3001. TDO is sampled on the falling edge of` TCK.
TMS
5
I (Int. PU)
TEST MODE SELECT:
Controls the operating mode of the
JTAG interface. TMS is sampled on the rising edge of TCK.
TRSTB
4
I (Int. PU)
TEST PORT RESET:
Active low input used to reset the
JTAG interface.
Table 5. JTAG Interface Pins Description
