
S3C2440A RISC MICROPROCESSOR
PRODUCT OVERVIEW
1-19
The table below shows I/O types and descriptions.
Input (I)/Output (O) Type
Descriptions
d12i(vdd12ih)
1.2V V
DD
for alive power
d12c(vdd12ih_core), si(vssih)
1.2V V
DD
/V
SS
for internal logic
d33o(vdd33oph), so(vssoph)
3.3V V
DD
/V
SS
for external logic
d33th(vdd33th_abb),sth(vssbbh_abb)
3.3V V
DD
/V
SS
for analog circuitry
d12t(vdd12t_abb), st(vssbb_abb)
1.2V V
DD
/V
SS
for analog circuitry
drtc(vdd30th_rtc)
3.0V V
DD
for RTC power
t8(phbsu100ct8sm)
Bi-directional pad, LVCMOS schmitt-trigger, 100k
pull-up resistor with
control, tri-state, Io = 8mA
is(phis)
Input pad, LVCMOS schmitt-trigger level
us(pbusb0)
USB pad
t10(phtot10cd)
5V tolerant output pad, tri-state.
ot(phot8)
Output pad, tri-state, Io = 8mA
b8(phob8)
Output pad, Io = 8mA
t16(phot16sm)
Output pad, tri-state, medium slew rate, Io = 16mA
r10(phiar10_abb)
Analog input pad with 10
resistor
ia(phia_abb)
Analog input pad
gp(phgpad_option)
Pad for analog pin
m26(phsoscm26_2440a)
Oscillator cell with enable and feedback resistor
t12(phbsu100ct12sm)
Bi-directional pad, LVCMOS schmitt-trigger, 100k
pull-up resistor with
control, tri-state, Io = 12mA
d8(phbsd8sm)
Bi-directional pad, LVCMOS schmitt-trigger, open drain, Io = 8mA
t10s(phtot10cd_10_2440a)
output pad, LVCMOS, tri -state, output drive strenth control, Io = 4, 6, 8,
10mA
b12s(phtbsu100ct12cd_12_2440a)
Bi-directional pad, LVCMOS schmitt-trigger, 100k
pull-up resistor with
control, tri -state,output drive strenth control, Io = 6, 8, 10, 12mA
d2s(phtbsd2_2440a)
Bi-directional pad, LVCMOS schmitt-trigger, open-drain, output drive
strenth ignore,
r50(phoar50_abb)
Analog output pad, 50k
resistor, separated bulk-bias
t12s(phtot12cd_12_2440a)
output pad, LVCMOS, tri -state, output drive strenth control, Io = 6, 8,
10, 12mA
nc(phnc)
No connection pad