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參數資料
型號: HMS77C1000A
廠商: Hynix Semiconductor Inc.
元件分類: 數學處理器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁數: 9/45頁
文件大小: 549K
代理商: HMS77C1000A
HMS77C1000A/HMS77C1001A
6
Oct. 2001 Ver. 2.0
5. PIN FUNCTION
V
DD
: Supply voltage.
V
SS
: Circuit ground.
RESET
: Reset the MCU.
X
IN
: Input to the inverting oscillator amplifier and input to
the internal main clock operating circuit.
X
OUT
: Output from the inverting oscillator amplifier.
RA0~RA3
: RA is an 4-bit, CMOS, bidirectional I/O port.
RA pins can be used as outputs or inputs according to “0”
or “1” written the their Port Direction Register(TRISA).
RB0~RB7
: RB is a 8-bit, CMOS, bidirectional I/O port.
RB pins can be used as outputs or inputs according to “0”
or “1” written the their Port Direction Register(TRISB).
EC0
: EC0 is an external clock input to Timer0. It should
be tied to V
SS
or V
DD
, if not in use, to reduce current con-
sumption.
Legend : I =input, O = output, I/O = input/output, P = power, - = Not used, TTL = TTL input, ST = Schmitt Trigger input
PIN NAME
DIP, SOP
Pin No.
SSOP
Pin No.
In/Out
Input
Levels
Function
V
DD
14
15,16
P
-
Supply voltage
V
SS
5
5,6
P
-
Circuit ground
RESET
4
4
I
ST
Reset signal input/programming voltage input. This pin is an active low
reset to the device. Voltage on the RESET pin must not exceed V
DD
to
avoid unintended entering of programming mode.
X
IN
16
18
I
ST
Oscillator crystal input/external clock source input
X
OUT
15
17
O
-
Oscillator crystal output. Connects to crystal or resonator in crystal oscilla-
tor mode. In RC mode, X
OUT
pin outputs CLKOUT which has 1/4 the fre-
quency of X
IN
, and denotes the instruction cycle rate.
RA0
17
19
I/O
TTL
4-bit bi-directional I/O ports
RA1
18
20
I/O
TTL
RA2
1
1
I/O
TTL
RA3
2
2
I/O
TTL
RB0
6
7
I/O
TTL
8-bit bi-directional I/O ports
RB1
7
8
I/O
TTL
RB2
8
9
I/O
TTL
RB3
9
10
I/O
TTL
RB4
10
11
I/O
TTL
RB5
11
12
I/O
TTL
RB6
12
13
I/O
TTL
RB7
13
14
I/O
TTL
EC0
3
3
I
ST
Clock input to Timer0. Must be tied to V
DD
or V
SS
, if not in use, to reduce
current consumption.
TABLE 5-1 PINOUT DESCRIPTION
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