
MFC2000 Multifunctional Peripheral Controller 2000
Hardware Description
3-2
Conexant
100723A
Table 3-1. Pin Description (2 of 6)
Pin Name
Pin No.
I/O
Input
Type
Output
Type
Pin Description
CASEn[1:0]
E20,E19
O
-
2XT3V
DRAM column even address selects used for non-
interleave mode and interleave mode. (VDRAM
powered)
DWRn
D17
O
-
2XT3V
DRAM write. (VDRAM powered)
DMAACK2
K19
O
-
1XT5VT
External DMA acknowledge output (channel 2).
DMAREQ2
F4
I
H5VT
-
(Hysteresis) External DMA request input (channel
2).
FCS0n/PWM[1]
D9
O
-
2XT5VT
Flash memory chip select 0 or PWM channel 1
output
FCS1n/PWM[2]
A8
O
-
2XT5VT
Flash memory chip select 1 or PWM channel 2
output signal.
RESETn
K18
I/O
HU5VT
2XT5VT
(Hysteresis, Pull up) MFC2000 Reset input/output
XIN
G20
I
OSC
-
Crystal oscillator input pin for RTC. (VRTC
powered)
XOUT
H20
O
-
OSC
Crystal oscillator output pin for RTC. (VRTC
powered)
PWRDWNn
H18
I
H3V
-
(Hysteresis) Indicate the loss of prime power
(result in SYSIRQ). (VRTC powered)
WPROTn
H19
O
-
1XT3V
Write Protect during loss of VDD power.
Note
: The
functional logic is powered by RTC battery power,
but the output drive is powered by DRAM battery
power. (VRTC powered)
BATRSTn
G17
I
H3V
-
(Hysteresis) Battery power reset input. (VRTC
powered)
EXT_PWRDWN_SELn
G19
I
H3V
-
(Hysteresis) External power-down detector select
input (active low)(VRTC powered)
SC_START[0]
V8
O
-
1XT3V
Scanner shift gate control 0
SC_CLK1/SC_CLK2A
U9
O
-
1XT3V
Scanner clock.
SC_LEDCTRL[0]
U7
O
-
1XT3V
Scanner LED control 0
SC_LEDCTRL[1]/
SC_START[1]
Y8
O
-
1XT3V
Scanner LED control 1 or Scanner shift gate
control 1
SC_LEDCTRL[2]/
SC_START[2]
W8
O
-
1XT3V
Scanner LED control 2 or Scanner shift gate
control 2
SSTXD1
J19
O
-
2XT3V
TX data for SSIF1
SSRXD1
H17
I
HU5VT
-
(Hysteresis, Pull up) RX data for SSIF1
SSCLK1
J20
I/O
H5VT
2XT5VT
(Hysteresis) Clock input or output for SSIF1
GPIO[0]/FWRn/CLAMP
J4
I/O
H5VT
2XT5VT
(Hysteresis) GPIO[0] or flash write enable signal
for NAND-type flash memory or scanner clamp
control output
GPIO[1]/FRDn
M3
I/O
H5VT
2XT5VT
(Hysteresis) GPIO[1] or flash read enable signal for
NAND-type flash memory.
GPIO[2]/DMAREQ1/ SSCLK2
V1
I/O
H5VT
2XT5VT
(Hysteresis) GPIO[2] or DMA channel 1 request
input or clock input/output for SSIF2.
GPIO[3]/DMAACK1/ SSRXD2
U4
I/O
H5VT
2XT5VT
(Hysteresis) GPIO[3] or DMA channel 1
acknowledge or RX data for SSIF2
GPIO[4]/CS[2]n
U3
I/O
H5VT
2XT5VT
(Hysteresis) GPIO[4] or I/O chip select [2] (active
low)
GPIO[5]/CS[3]n/PWM[3]
U2
I/O
H5VT
2XT5VT
(Hysteresis) GPIO[5]or I/O chip select [3] (active
low) or PWM channel 3 output