ADSP-21061/ADSP-21061L
Pin
Type
Function
TFSx
RFSx
EBOOT
I/O
I/O
I
Transmit Frame Sync (Serial Ports 0, 1).
Receive Frame Sync (Serial Ports 0, 1).
EPROM Boot Select. When EBOOT is high, the ADSP-21061 is configured for booting from an 8-
bit EPROM. When EBOOT is low, the LBOOT and BMS inputs determine booting mode. See table
below. This signal is a system configuration selection which should be hardwired.
LBOOT
I
Link Boot—Must be tied to GND.
BMS
I/O/T*
Boot Memory Select. Output: Used as chip select for boot EPROM devices (when EBOOT = 1,
LBOOT = 0). In a multiprocessor system, BMS is output by the bus master. Input: When low, indi-
cates that no booting will occur and that ADSP-21061 will begin executing instructions from external
memory. See table below. This input is a system configuration selection which should be hardwired.
*Three-statable only in EPROM boot mode (when BMS is an output).
EBOOT
LBOOT
BMS
Booting Mode
1
0
0
0
0
0
Output
1 (Input)
0 (Input)
EPROM (Connect BMS to EPROM chip select.)
Host Processor
No Booting. Processor executes from external memory.
CLKIN
I
Clock In. External clock input to the ADSP-21061. The instruction cycle rate is equal to CLKIN.
CLKIN may not be halted, changed, or operated below the specified frequency.
RESET
I/A
Processor Reset. Resets the ADSP-21061 to a known state and begins execution at the program
memory location specified by the hardware reset vector address. This input must be asserted (low) at
power-up.
TCK
TMS
I
I/S
Test Clock (JTAG). Provides an asynchronous clock for JTAG boundary scan.
Test Mode Select (JTAG). Used to control the test state machine. TMS has a 20 kΩ internal pull-up
resistor.
TDI
I/S
Test Data Input (JTAG). Provides serial data for the boundary scan logic. TDI has a 20 kΩ internal
pull-up resistor.
TDO
O
Test Data Output (JTAG). Serial scan output of the boundary scan path.
TRST
I/A
Test Reset (JTAG). Resets the test state machine. TRST must be asserted (pulsed low) after power-
up or held low for proper operation of the ADSP-21061. TRST has a 20 kΩ internal pull-up resistor.
EMU
ICSA
VDD
GND
NC
O
O
P
Emulation Status. Must be connected to the ADSP-21061 EZ-ICEtarget board connector only.
Reserved, leave unconnected.
Power Supply; nominally +3.3 V dc for ADSP-21061L, +5.0 V dc for ADSP-21061.
Power Supply Return.
Do Not Connect. Reserved pins which must be left open and unconnected.
G
REV. B
–11–
ADI [ ADI ]
