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W78LE516P-24

W78LE516P-24首页预览图
型号: W78LE516P-24
PDF文件:
  • W78LE516P-24 PDF文件
  • W78LE516P-24 PDF在线浏览
功能描述: 8-BIT MICROCONTROLLER
PDF文件大小: 287.33 Kbytes
PDF页数: 共31页
制造商: WINBOND[Winbond]
制造商LOGO: WINBOND[Winbond] LOGO
制造商网址: http://www.winbond.com
捡单宝W78LE516P-24
PDF页面索引
120%
Preliminary W78LE516
- 6 -
Power Management
Idle Mode
Setting the IDL bit in the PCON register enters the idle mode. In the idle mode, the internal clock to
the processor is stopped. The peripherals and the interrupt logic continue to be clocked. The
processor will exit idle mode when either an interrupt or a reset occurs.
Power-down Mode
When the PD bit in the PCON register is set, the processor enters the power-down mode. In this
mode all of the clocks are stopped, including the oscillator. To exit from power-down mode is by a
hardware reset or external interrupts INT0 to
INT1
when enabled and set to level triggered.
Reduce EMI Emission
The W78LE516 allows user to diminish the gain of on-chip oscillator amplifier by using programmer
to clear the B7 bit of security register. Once B7 is set to 0, a half of gain will be decreased. Care must
be taken if user attempts to diminish the gain of oscillator amplifier, reducing a half of gain may affect
the external crystal operating improperly at high frequency. The value of C1 ana C2 may need some
adjustment while running at lower gain.
Reset
The external RESET signal is sampled at S5P2. To take effect, it must be held high for at least two
machine cycles while the oscillator is running. An internal trigger circuit in the reset line is used to
deglitch the reset line when the W78LE516 is used with an external RC network. The reset logic also
has a special glitch removal circuit that ignores glitches on the reset line. During reset, the ports are
initialized to FFH, the stack pointer to 07H, PCON (with the exception of bit 4) to 00H, and all of the
other SFR registers except SBUF to 00H. SBUF is not reset.
W78LE516 Special Function Registers (SFRs) and Reset Values
F8
FF
F0 +B
00000000
CHPENR
00000000
F7
E8
EF
E0 +ACC
00000000
E7
D8
+P4
xxxx1111
DF
D0 +PSW
00000000
D7
C8 +T2CON
00000000
RCAP2L
00000000
RCAP2H
00000000
TL2
00000000
TH2
00000000
CF
C0 XICON
00000000
P4CONA
00000000
P4CONB
00000000
SFRAL
00000000
SFRAH
00000000
SFRFD
00000000
SFRCN
00000000
C7
B8 +IP
00000000
CHPCON
0xx00000
BF
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