參數(shù)資料
型號: TMS370C077A
廠商: Texas Instruments, Inc.
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 42/54頁
文件大?。?/td> 785K
代理商: TMS370C077A
TMS370Cx9x
8-BIT MICROCONTROLLER
SPNS036B – JANUARY 1996 – REVISED FEBRUARY 1997
42
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
PARAMETER MEASUREMENT INFORMATION
External
Clock Signal
XTAL1
XTAL2/CLKIN
C2
(see Note B)
C1
(see Note B)
Crystal/Ceramic
Resonator
(see Note A)
XTAL1
XTAL2/CLKIN
C3
(see Note B)
NOTES: A. The crystal/ceramic resonator frequency is four times the reciprocal of the system clock period.
B. The values of C1 and C2 are typically 15 pF and C3 is typically 50 pF. See the manufacturer’s recommendations for ceramic
resonators.
Figure 14. Recommended Crystal/Clock Connections
1.2 k
20 pF
VO
Load Voltage
Case 1: VO = VOH = 2.4 V; Load Voltage = 0 V
Case 2: VO = VOL = 0.4 V; Load Voltage = 2.1 V
NOTE A: All measurements are made with the pin loading as shown unless otherwise noted. All measurements are made with XTAL2/CLKIN
driven by an external square wave signal with a 50% duty cycle and rise and fall times less than 10 ns unless otherwise stated.
Figure 15. Typical Output Load Circuit (see Note A)
VCC
GND
300
20
I/O
Pin Data
Output
Enable
VCC
GND
INT1
6 k
20
30
Figure 16. Typlcal Buffer Circuitry
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