參數(shù)資料
型號(hào)： 87LPC762
廠商： NXP Semiconductors N.V.
元件分類： 微控制器/微處理器
英文描述： Low power, low price, low pin count 20 pin microcontroller with 2 kbyte OTP
中文描述： 低功耗，低價(jià)格，低管腳數(shù)的2字節(jié)OTP 20引腳微控制器
文件頁(yè)數(shù)： 48/57頁(yè)
文件大?。?/td> 312K
代理商： 87LPC762
Philips Semiconductors
Preliminary data
87LPC762
Low power, low price, low pin count (20 pin)
microcontroller with 2 kbyte OTP
2001 Oct 26
45
BIT
UCFG2.7, 6
UCFG2.5–0
SYMBOL
SB2, SB1
—
FUNCTION
EPROM security bits. See table entitled, “EPROM Security Bits” for details.
Reserved for future use.
—
SU01186
—
—
—
—
—
SB1
SB2
0
1
2
3
4
5
6
7
UCFG2
Unprogrammed Value: FFh
Address: FD01h
Figure 37. EPROM System Configuration Byte 2 (UCFG2)
Security Bits
When neither of the security bits are programmed, the code in the EPROM can be verified. When only security bit 1 is programmed, all further
programming of the EPROM is disabled. At that point, only security bit 2 may still be programmed. When both security bits are programmed,
EPROM verify is also disabled.
Table 11. EPROM Security Bits
SB2
SB1
Protection Description
1
1
Both security bits unprogrammed. No program security features enabled. EPROM is programmable and verifiable.
1
0
Only security bit 1 programmed. Further EPROM programming is disabled. Security bit 2 may still be programmed.
0
1
Only security bit 2 programmed. This combination is not supported.
0
0
Both security bits programmed. All EPROM verification and programming are disabled.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
RATING
UNIT
Operating temperature under bias
–55 to +125
°
C
°
C
Storage temperature range
–65 to +150
Voltage on RST/V
PP
pin to V
SS
Voltage on any other pin to V
SS
Maximum I
OL
per I/O pin
Power dissipation (based on package heat transfer, not device power consumption)
NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section
of this specification are not implied.
2. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static
charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maximum.
3. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise noted.
0 to +11.0
V
–0.5 to V
DD
+0.5V
20
V
mA
1.5
W
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