參數(shù)資料
型號(hào)： P87C592EFA
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-bit microcontroller with on-chip CAN
中文描述： 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQCC68
文件頁(yè)數(shù)： 69/108頁(yè)
文件大?。?/td> 650K
代理商： P87C592EFA
1996 Jun 27
69
Philips Semiconductors
Product specification
8-bit microcontroller with on-chip CAN
P8xC592
15.4
Power-down Mode
The instruction that sets bit PCON.1 to HIGH, is the last
one executed before entering the Power-down mode. In
Power-down mode the oscillator of the P8xC592 is
stopped. If the CAN-controller is in use, it is recommended
to set it into Sleep mode before entering Power-down
mode. However, setting PCON.1 to HIGH also sets the
Sleep bit (CAN-controller Command Register bit 4) to
HIGH.
The P8xC592 leaves Power-down mode either by a
hardware reset or by a CAN Wake-Up interrupt
(due to activity on the CAN-bus),
if the SIO1 (CAN) interrupt source is enabled
(contents of register IEN0 = 1X1XXXXXB).
A hardware reset affects the whole P8xC592, but leaves
the contents of the on-chip RAM unchanged
(CAN-controller-and CPU's SFRs are reset, see
Section 13.5.2, Chapter 17 and Table 40). A CAN
Wake-Up interrupt during Power-down mode causes a
reset output pulse with a width of 6144 machine cycles
(4.6 ms with f
CLK
= 16 MHz). All hardware except that for
the CAN-controller of the P8xC592 is reset (i.e. the
contents of all CAN-controller registers are preserved).
A capacitance connected to the RST pin can be used to
lengthen the internally generated reset pulse. If the pulse
exceeds 8192 machine cycles, the CAN-controller part is
reset too.
Table 82
Status of external pins during Idle and Power-down modes
Note
1.
If the port pins P1.6 and P1.7 are used as the CAN transmitter outputs (CTX0 and CTX1), then during Sleep and
Power-down mode these pins output a ‘recessive’ level (see Sections 13.5.2 and 13.5.11).
MODE
PROGRAM
ALE
PSEN
PORT0
PORT1
(1)
PORT2
PORT3
PORT4
PWM0/
PWM1
Idle
internal
external
internal
external
1
1
0
0
1
1
0
0
port data
floating
port data
floating
port data
port data
port data
port data
port data
address
port data
port data
port data
port data
port data
port data
port data
port data
port data
port data
1
1
1
1
Power-down
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