Renesas PCA7400 Instrukcja Użytkownika Strona 21
- Strona / 98
- Spis treści
- BOOKMARKI
Oceniono. / 5. Na podstawie oceny klientów
MITSUBISHI MICROCOMPUTERS
M37271MF-XXXSP
M37271EF-XXXSP, M37271EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
20
SERIAL I/O
The M37271MF-XXXSP has a built-in serial I/O which can either trans-
mit or receive 8-bit data in serial in the clock synchronous mode.
The serial I/O block diagram is shown in Figure 12. The synchroniz-
ing clock I/O pin (SCLK), and data output pin (SOUT) also function as
port P4, data input pin (SIN) also functions as port P1.
Bit 2 of the serial I/O mode register (address 021316) selects whether
the synchronizing clock is supplied internally or externally (from the
P46/SCLK pin). When an internal clock is selected, bits 1 and 0 select
whether f(XIN) is divided by 8, 16, 32, or 64. To use P45/SOUT and
P46/SCLK pins for serial I/O, set the corresponding bits of the port P4
direction register (address 00C916) to “0.” To use P17/SIN pin for
serial I/O, set the corresponding bit of the port P1 direction register
(address 00C316) to “0.”
Fig. 12. Serial I/O block diagram
The operation of the serial I/O function is described below. The func-
tion of the serial I/O differs depending on the clock source; external
clock or internal clock.
8
Serial I/O shift register (8)
Data bus
Serial I/O
interrupt request
Selection gate: Connect to
black colored
side at reset.
Synchronization
circuit
Frequency divider
1/81/4 1/16
SM1
SM0
Serial I/O counter (8)
SM5
: LSB
MSB
S
SM2
1/2
X
IN
P1
7
/S
IN
P4
5
/S
OUT
P4
6
/S
CLK
1/2
(Address 0214
16
)
X
CIN
1/2
CM7
1/2
Note : When the data is set in the serial I/O register (address 0214
16
), the register functions as the serial I/O shift register.
(Note)
CM : CPU mode register
SM : Serial I/O mode register
Powiązane produkty i podręczniki dla Dekodery Renesas PCA7400
Dekodery Renesas PCA7429G02 Informacje Techniczne
(145 strony)
(145 strony)
Dekodery Renesas PCA7401 Informacje Techniczne
(97 strony)
(97 strony)
Whirlpool RB17UPXL manuales
Manuales del propietario y guías del usuario para Hornos Whirlpool RB17UPXL.
Ofrecemos 1 manuales en pdf Whirlpool RB17UPXL para descargar gratis por tipos de documentos: Manual de usuario
Komentarze do niniejszej Instrukcji