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參數(shù)資料
| 型號(hào)： | HD404054 |
| 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)： | 37/101頁 |
| 文件大?。?/td> | 610K |
| 代理商： | HD404054 |
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HD404054 Series/HD404094 Series
37
The on/off statuses of the output buffers are controlled by D-port data control registers (DCD0–DCD2:
$02C–$02E) that are mapped to memory addresses (figure 20).
Pins D
12
and D
13
are multiplexed with peripheral function pins
S T OP C
and
I NT
0
, respectively. The
peripheral function modes of these pins are selected by bits 2 and 3 (PMRC2, PMRC3) of port mode
register C (PMRC: $025) (figure 22).
R Ports (R0
0
–RE
0
):
17 input/output pins and 6 input pins addressed in 4-bit units. Data is input to these
ports by the LAR and LBR instructions, and output from them by the LRA and LRB instructions. *Output
data is stored in the port data register (PDR) for each pin. The on/off statuses of the output buffers of the R
ports are controlled by R-port data control registers (DCR0–DCR4: $030–$034) that are mapped to
memory addresses (figure 20).
Pin R0
0
is are multiplexed with peripheral pin
INT
1
respectively. The peripheral function modes of these
pins are selected by bit 0 (PMRB0) of port mode register B (PMRB: $024) (figure 21).
Pins R3
1
–R3
2
are multiplexed with peripheral pins TOC and TOD respectively. The peripheral function
modes of these pins are selected by bits 0–2 (TMC20–TMC22) of timer mode register C2 (TMC2: $014),
and bits 0–3 (TMD20–TMD23) of timer mode register D2 (TMD2: $015) (figures 23, and 24).
Pin R4
0
is multiplexed with peripheral pin EVND respectively. The peripheral function modes of these
pins are selected by bit 1 (PMRC1) of port mode register C (PMRC: $025) (figure 22).
Pins R4
1
–R4
3
are multiplexed with peripheral pins
SCK
1
, SI
1
, and SO
1
, respectively. The peripheral
function modes of these pins are selected by bit 3 (SM1A3) of serial mode register 1A (SM1A: $005), and
bits 0 and 1 (PMRA0, PMRA1) of port mode register A (PMRA: $004), as shown in figures 25 and 26.
Ports RD
0
and RD
1
are multiplexed with peripheral function pins COMP
0
and COMP
1
, respectively. The
function modes of these pins are selected by bit 3 (CER3) of the compare enable register (CER: $018)
(figure 27).
Port RE
0
is multiplexed with peripheral function pin VC
ref
. While functioning as VC
ref
, do not use this pin
as an R port at the same time, otherwise, the MCU may malfunction.
Pull-Up or Pull-Down MOS Transistor Control:
A program-controlled pull-up or pull-down MOS
transistor is provided for each input/output pin other than input-only pins D
12
and D
13
. The on/off status of
all these transistors is controlled by bit 3 (MIS3) of the miscellaneous register (MIS: $00C), and the on/off
status of an individual transistor can also be controlled by the port data register (PDR) of the corresponding
pin—enabling on/off control of that pin alone (table 20 and figure 28).
The on/off status of each transistor and the peripheral function mode of each pin can be set independently.
How to Deal with Unused I/O Pins:
I/O pins that are not needed by the user system (floating) must be
connected to V
CC
to prevent LSI malfunctions due to noise. These pins must either be pulled up to V
CC
by
their pull-up MOS transistors or by resistors of about 100 k
or pulled down to GND by their pull-down
MOS transistors.
Note:
*If nonexisted bits of R ports is read, undifined data will be latched to accumulator (A) or the B
register.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD4074054H | 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī)) |
| HD40A4054 | 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī)) |
| HD40A4358 | 4-bit HMCS400-Series microcomputer |
| HD404354 | 4-bit HMCS400-Series microcomputer |
| HD404354H | 4-bit HMCS400-Series microcomputer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD404054H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:HMCS400-series microcomputers designed to increase program productivity with large-capacity memory |
| HD404054S | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:HMCS400-series microcomputers designed to increase program productivity with large-capacity memory |
| HD404054SERIES/HD404094SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| HD404081FT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| HD404081H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
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