
Terminal Functions
66
April 2003 Revised June 2004
SPRS219D
Table 210. Terminal Functions (Continued)
SIGNAL
DESCRIPTION
IPU
TYPE
NAME
IPD/
GDK/
GNZ
HOST-PORT INTERFACE (HPI) OR PERIPHERAL COMPONENT INTERCONNECT (PCI) OR EMAC
PCI_EN
E2
I
IPD
PCI enable pin. This pin and the MAC_EN pin control the selection (enable/disable) of
the HPI, EMAC, MDIO, and GP0[15:8], or PCI peripherals. The pins work in conjunction
to enable/disable these peripherals (for more details, see the Device Configurations
section of this data sheet).
HINT/PFRAME§
N4
I/O/Z
Host interrupt from DSP to host (
O
) [default] or PCI frame (
I/O/Z
)
HCNTL1/
PDEVSEL§
P1
I/O/Z
Host control selects between control, address, or data registers (
I
) [default] or PCI
device select (
I/O/Z
).
HCNTL0/
PSTOP§
R3
I/O/Z
Host control selects between control, address, or data registers (
I
) [default] or PCI
stop (
I/O/Z
)
HHWIL/PTRDY§
N3
I/O/Z
Host half-word select first or second half-word (not necessarily high or low order)
[For HPI16 bus width selection only] (
I
) [default] or PCI target ready (
I/O/Z
)
HR/W/PCBE2§
HAS/PPAR§
HCS/PPERR§
HDS1/PSERR§
HDS2/PCBE1§
HRDY/PIRDY§
I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground
IPD = Internal pulldown, IPU = Internal pullup. (These IPD/IPU signal pins feature a 30-k
IPD or IPU resistor. To pull up a signal to the opposite
supply rail, a 1-k
resistor should be used.)
§These pins are multiplexed pins. For more details, see the Device Configurations section of this data sheet.
PLLV is not part of external voltage supply. See the Clock PLL section for information on how to connect this pin.
#A = Analog signal (PLL Filter)
||The EMU0 and EMU1 pins are internally pulled up with 30-k
resistors; therefore, for emulation and normal operation, no external
pullup/pulldown resistors are necessary. However, for boundary scan operation, pull down the EMU1 and EMU0 pins with a dedicated 1-k
resistor.
M1
I/O/Z
Host read or write select (
I
) [default] or PCI command/byte enable 2 (
I/O/Z
)
P3
I/O/Z
Host address strobe (
I
) [default] or PCI parity (
I/O/Z
)
R1
I/O/Z
Host chip select (
I
) [default] or PCI parity error (
I/O/Z
)
R2
I/O/Z
Host data strobe 1 (
I
) [default] or PCI system error (
I/O/Z
)
T2
I/O/Z
Host data strobe 2 (
I
) [default] or PCI command/byte enable 1 (
I/O/Z
)
N1
I/O/Z
Host ready from DSP to host (
O
) [default] or PCI initiator ready (
I/O/Z
).