ꢀ ꢁꢂ ꢃꢄ ꢅꢆ ꢃꢅ
ꢇꢈ ꢉꢈ ꢊꢋꢌ ꢀꢈ ꢉ ꢍꢋꢌ ꢎꢏ ꢐ ꢆꢑ ꢀ ꢀꢐ ꢏ
SGUS014H − FEBRUARY 1991 − REVISED JUNE 2004
Pin Functions (Continued)
CONDITIONS
WHEN
SIGNAL IS Z TYPE
PIN
†
DESCRIPTION
TYPE
‡
QTY
NAME
§
SUPPLY AND OSCILLATOR SIGNALS (see Note 1) (CONTINUED)
IV
1
1
1
I
NC
I
Ground
SS
V
V
V
BB
pump oscillator output
BBP
Substrate pin. Tie to ground
SUBS
Output from the internal oscillator for the crystal. If a crystal is not used, X1 must
be left unconnected.
X1
1
O
X2/CLKIN
1
1
1
I
Input to the internal oscillator from the crystal or a clock
External H1 clock. H1 has a period equal to twice CLKIN.
External H3 clock. H3 has a period equal to twice CLKIN.
RESERVED (see Note 2)
H1
H3
O/Z
O/Z
S
S
EMU0−EMU2
EMU3
3
1
I
Reserved. Use pullup resistors to 5 V
Reserved
O/Z
S
Shutdown high impedance. When active, EMU4/SHZ shuts down the SMJ320C30
and places all pins in the high-impedance state. EMU4/SHZ is used for board-level
testing to ensure that no dual-drive conditions occur. CAUTION: A low on SHZ
corrupts SMJ320C30 memory and register contents. Reset the device with SHZ
high to restore it to a known operating condition.
EMU4/SHZ
1
I
EMU5, EMU6
RSV0−RSV4
RSV5−RSV10
Locator
2
5
6
1
NC
I
Reserved
Reserved. Tie pins directly to 5 V
Reserved. Use pullups on each pin to 5 V
Reserved
I/O
NC
†
‡
§
I = input, O = output, Z = high-impedance state, NC=No Connect
For GB package
S = SHZ active, H = HOLD active, R = RESET active
NOTES: 1. CV , V , IV
are on the same plane.
SS SS SS
2. The connections specified for the reserved pins must be followed. For best results, 18-kΩ−22-kΩ pullup resistors are
recommended. All 5-V supply pins must be connected to a common supply plane, and all ground pins must be connected to a
common ground plane.
9
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
TI [ TEXAS INSTRUMENTS ]
