參數(shù)資料
型號： HD404816
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
中文描述： 4位單片機(jī)（4位單片微計(jì)算機(jī)）
文件頁數(shù)： 23/98頁
文件大?。?/td> 621K
代理商： HD404816
HD404818 Series
23
Interrupt Enable Flag (IE: $000, Bit 0):
The interrupt enable flag enables/disables interrupt requests
(table 4). It is reset by an interrupt and set by the RTNI instruction.
Table 4 Interrupt Enable Flag
IE
Interrupt Enabled/Disabled
0
Disabled
1
Enabled
External Interrupts (
INT
0
,
INT
1
):
The external interrupt request inputs (
INT
0
,
INT
1
) can be selected by
port mode register A (PMRA: $004).
The external interrupt request flags (IF0, IF1) are set at the falling edge of
I NT
0
and
I NT
1
inputs,
respectively (table 5).
The
INT
1
input can be used as a clock signal input to timer B, in which timer B counts up at each falling
edge of the
INT
1
input. When using
INT
1
as the timer B external event input, the external interrupt mask
(IM1) has to be set so that the interrupt request by
INT
1
will not be accepted (table 6).
More than two instruction cycle times (2t
cyc
/2t
subcyc
) are needed to detect the edge of
INT
0
or
INT
1
.
External Interrupt Request Flags (IF0: $000, Bit 2; IF1: $001, Bit 0):
The external interrupt request
flags (IF0, IF1) are set at the falling edge of the
INT
0
and
INT
1
inputs, respectively (table 5).
Table 5 External Interrupt Request Flags
IF0, IF1
Interrupt Request
0
No
1
Yes
External Interrupt Masks (IM0: $000, Bit 3; IM1: $001, Bit 1):
The external interrupt masks mask the
external interrupt requests (table 6).
Table 6 External Interrupt Masks
IM0, IM1
Interrupt Request
0
Enabled
1
Disabled (masked)
Timer A Interrupt Request Flag (IFTA: $001, Bit 2):
The timer A interrupt request flag is set by the
overflow output of timer A (table 7).
相關(guān)PDF資料
PDF描述
HD404814FS 16-digit LCD driver
HD4074899 16-digit LCD driver
HD404814H 16-digit LCD driver
HD404814TF 16-digit LCD driver
HD404818 16-digit LCD driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404816FS 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD404816H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD404816TF 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD404818 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD404818FS 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:16-digit LCD driver
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