
ISD-300A1
43
October 19, 2001
TEST<3:0> Pins - Test Modes
TEST(3:0)
Mode Description
0000
Normal Mode -
This is the default mode of operation, or run time mode. Pull-downs
are on.
Normal Mode XCVR Muxout
– debug mode 1. See
XCVR Mux-out Mode
below.
Limbo -
Setting this mode disables most outputs. See
Limbo
Mode
below.
Input NandTree
– Allows board level manufacturing tests. See
Input NandTree
Mode
below.
Bi-di NandTree
– Allows board level manufacturing tests. See
Bi-di NandTree
Mode
below.
SimTest –
HDL simulation only test mode. Specific GPIO pins are multiplexed in this
mode of operation:
Short Timers
GPIO[2]
Short SRAM
GPIO[1]
Skip Identify
GPIO[0]
Scan
M
ode –
Fab only test mode
Reserved
Normal Mode XCVR Mux-out
– ASIC debug mode 2. See
XCVR Mux-out Mode
.
Normal Mode XCVR Mux-out
– ASIC debug mode 3. See
XCVR Mux-out Mode
.
Normal Mode XCVR Mux-out
– ASIC debug mode 4. See
XCVR Mux-out Mode
.
Test Bus
– SERDES Fab only test mode
Test Bus –
ROM Fab only test mode
Test Bus –
256x8 SP SRAM. Fab only test mode
Test Bus –
32x16 DP SRAM. Fab only test mode
Test Bus -
4Kx16 DP SRAM. Fab only test mode
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Table 23 – Test Modes
XCVR Mux-out Mode
These modes of operation are similar to the Normal Mode of operation with various internal transceiver
logic signals brought out through the GPIO and LED pins. These modes are intended only for Cypress
ASIC qualification. The table below shows the mux-out scheme for each mode of operation.
Pin #
ISD-300A1
Pin Name
XCVR signal
signal
38
GPIO0
RXERROR
IHSDRVON
39
GPIO1
RXBUSACT
CDRCLKEN
40
GPIO2
RXDOUT(0)
CLK_30
42
GPIO3
RXDOUT(1)
CLK_60
44
GPIO4
RXDOUT(2)
LPBACK1
45
GPIO5
RXDOUT(3)
LPBACK0
46
GPIO6
RXDOUT(4)
LOCK
47
GPIO7
RXDOUT(5)
IOST1
48
GPIO8
RXDOUT(6)
IOST0
49
GPIO9
RXDOUT(7)
HSRCVEN
94
NLED1
RXLSTBYT
0
95
NLED0
RXVALID
PWRDOWN_XCVR TXBUSACT
Mode 1 –
Mode 2 – XCVR
Mode 3 –
XCVR signal
TXREADY
TXVALID
TXDIN(0)
TXDIN(1)
TXDIN(2)
TXDIN(3)
TXDIN(4)
TXDIN(5)
TXDIN(6)
TXDIN(7)
RXACTIVE
Mode 4 –
XCVR signal
PUE
CLRXVM
CLRSVP
CLRXISE0
CLRSDATA
CNEN
CLRCVEN
CLTXOEN
CLTXOSE0
CLTXDATA
CONTJ
CONTK