
10
MB90640A Series
(Continued)
*1: FPT-100P-M05
*2: FPT-100P-M06
Pin no.
Pin name
Circuit
type
Function
LQFP*
1
QFP*
2
57
59
P91
D
(CMOS/H)
General purpose I/O port
This applies when serial data output is disabled for UART1.
SOT1
Serial data output pin for UART1
This applies when serial data output is enabled for UART1.
58
60
P92
D
(CMOS/H)
General purpose I/O port
This applies when the UART1 clock output is disabled.
SCK1
Clock I/O pin for UART1
This applies when the UART1 clock output is enabled.
As the input operates continuously when UART1 is set to
input operation, output to the pin from other functions must
be stopped unless done intentionally.
59 to 61
61 to 63
P93 to P95
D
(CMOS/H)
General purpose I/O port
25
27
C
—
Capacitor pin for stabilizing power supply
Connect about 0.1
μ
F ceramic capacitor outside ROM.
MB90P641 doesn’t need to be connected the capacitor.
It isn’t problem even the capacitor is connected to
MB90P641A.
62 to 69
64 to 71
PA0 to PA7
I
(CMOS/H)
General purpose I/O ports
This applies for pins with chip select output disabled by the
chip select control register.
CS0 to CS7
Output pins for the chip select function
This applies for pins with chip select output enabled by the
chip select control register.
21,
32,
33,
82
23,
34,
35,
84
V
CC
Power
supply
Power supply for the digital circuits
9,
34,
35,
40,
79
11,
36,
37,
42,
81
V
SS
Power
supply
Ground level for the digital circuits