参数资料
型号: MB90654APF
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP100
封装: PLASTIC, QFP-100
文件页数: 74/106页
文件大小: 873K
代理商: MB90654APF
MB90650A Series
7
s
s PIN DESCRIPTION
(Continued)
Pin no.
Pin name
Circuit
type
Function
LQFP*1
QFP*2
80
82
X0
A
Crystal oscillator pin
81
83
X1
A
Crystal oscillator pin
77
79
X1A
B
Crystal oscillator pins (32 kHz)
78
80
X0A
B
Crystal oscillator pins (32 kHz)
47 to 49
49 to 51
MD0 to MD2
D
Operating mode selection pins
Connect directly to VCC or VSS.
50
52
TEST
D
Test input pin
This pin must always be fixed to “H”.
75
77
RST
C
Reset input pin
83 to 90
85 to 92
P00 to P07
E
(STBC)
General-purpose I/O ports
Pull-up resistors can be set (RD07 to RD00 = “1”) using the
pull-up resistor setting register (RDR0).
The setting does not apply for ports set as outputs (D07 to D00
= “1”: invalid at the output setting).
AD00 to AD07
In external bus mode, the pins function as the lower data I/O or
lower address outputs (AD00 to AD07).
91 to 98
93 to 100
P10 to P17
E
(STBC)
General-purpose I/O ports
Pull-up resistors can be set (RD17 to RD10 = “1”) using the
pull-up resistor setting register (RDR1).
The setting does not apply for ports set as outputs (D17 to D10
= “1”: invalid at the output setting).
AD08 to AD15
In 16-bit external bus mode, the pins function as the upper data
I/O or middle address outputs (AD08 to AD15).
99, 100,
1 to 6
1, 2,
3 to 8
P20, P21,
P22 to P27
I
(STBC)
General-purpose I/O ports
In external bus mode, pins for which the corresponding bit in
the external address output control register (HACR) is “1”
function as the general-purpose I/O pots.
A16, A17,
A18 to A23
External address bus output pins (A16 to A23)
In external bus mode, pins for which the corresponding bit in
the external address output control register (HACR) is “0”
function as the upper address output pins (A16 to A23).
79
P30
I
(STBC)
General-purpose I/O port
Functions as the ALE pin in external bus mode.
ALE
Functions as the address latch enable signal.
810
P31
I
(STBC)
General-purpose I/O port
Functions as the RD pin in external bus mode.
RD
Functions as the read strobe output (RD).
10
12
P32
I
(STBC)
General-purpose I/O port
Functions as the WRL pin in external bus mode if the WRE bit
in the ECSR register is “1”.
WRL
Functions as the lower data write strobe output (WRL).
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