M38869FFAHP Renesas Electronics America, M38869FFAHP Datasheet - Page 29

• Manufacturer Part Number: M38869FFAHP
• Description: IC 740 MCU FLASH 61K 80LQFP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M38869FFAHP

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, SIO, UART/USART
• Peripherals: PWM, WDT
• Number Of I /o: 64
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 80-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

SERIAL I/O
Serial I/O1
Serial I/O1 can be used as either clock synchronous or asynchro-
nous (UART) serial I/O. A dedicated timer is also provided for
baud rate generation.
Fig. 21 Block diagram of clock synchronous serial I/O1
Fig. 22 Operation of clock synchronous serial I/O1 function
26
W r i t e p u l s e t o r e c e i v e / t r a n s m i t
b u f f e r r e g i s t e r ( a d d r e s s 0 0 1 8
R e c e i v e e n a b l e s i g n a l S
T r a n s f e r s h i f t c l o c k
( 1 / 2 t o 1 / 2 0 4 8 o f t h e i n t e r n a l
c l o c k , o r a n e x t e r n a l c l o c k )
N o t e s 1 : A s t h e t r a n s m i t i n t e r r u p t ( T I ) , w h i c h c a n b e s e l e c t e d , e i t h e r w h e n t h e t r a n s m i t b u f f e r h a s e m p t i e d ( T B E = 1 ) o r a f t e r t h e
P 4
P 4
f ( X
( f ( X
P 4
P 4
4
6
7
I N
5
/ R
/ S
C I N
/ S
/ T
)
C L K 1
R D Y 1
X
X
) i n l o w - s p e e d m o d e )
D
D
2 : I f d a t a i s w r i t t e n t o t h e t r a n s m i t b u f f e r r e g i s t e r w h e n T S C = 0 , t h e t r a n s m i t c l o c k i s g e n e r a t e d c o n t i n u o u s l y a n d s e r i a l d a t a
3 : T h e r e c e i v e i n t e r r u p t ( R I ) i s s e t w h e n t h e r e c e i v e b u f f e r f u l l f l a g ( R B F ) b e c o m e s “ 1 ” .
S e r i a l o u t p u t T x D
S e r i a l i n p u t R x D
/ O B F
t r a n s m i t s h i f t o p e r a t i o n h a s e n d e d ( T S C = 1 ) , b y s e t t i n g t h e t r a n s m i t i n t e r r u p t s o u r c e s e l e c t i o n b i t ( T I C ) o f t h e s e r i a l I / O 1
c o n t r o l r e g i s t e r .
i s o u t p u t c o n t i n u o u s l y f r o m t h e T x D p i n .
/ S
1
1 0
R D Y 1
B R G c o u n t s o u r c e s e l e c t i o n b i t
1 6
)
F / F
T B E = 0
1 / 4
T B E = 1
T S C = 0
F a l l i n g - e d g e d e t e c t o r
D
D
0
0
R e c e i v e b u f f e r r e g i s t e r
R e c e i v e s h i f t r e g i s t e r
T r a n s m i t b u f f e r r e g i s t e r
T r a n s m i t s h i f t r e g i s t e r
D a t a b u s
D
D
D a t a b u s
1
1
A d d r e s s 0 0 1 8
S h i f t c l o c k
S e r i a l I / O 1 s y n c h r o n o u s
c l o c k s e l e c t i o n b i t
F r e q u e n c y d i v i s i o n r a t i o 1 / ( n + 1 )
B a u d r a t e g e n e r a t o r
A d d r e s s 0 0 1 8
S h i f t c l o c k
D
D
A d d r e s s 0 0 1 C
2
2
(1) Clock Synchronous Serial I/O Mode
Clock synchronous serial I/O1 mode can be selected by setting
the serial I/O1 mode selection bit of the serial I/O1 control register
(bit 6 of address 001A
For clock synchronous serial I/O, the transmitter and the receiver
must use the same clock. If an internal clock is used, transfer is
started by a write signal to the TB/RB.
1 6
1 6
D
D
C l o c k c o n t r o l c i r c u i t
C l o c k c o n t r o l c i r c u i t
3
3
1 6
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
S e r i a l I / O 1 c o n t r o l r e g i s t e r
T r a n s m i t i n t e r r u p t s o u r c e s e l e c t i o n b i t
R e c e i v e b u f f e r f u l l f l a g ( R B F )
S e r i a l I / O 1 s t a t u s r e g i s t e r
1 / 4
D
D
4
4
MITSUBISHI MICROCOMPUTERS
16
R e c e i v e i n t e r r u p t r e q u e s t ( R I )
) to “1”.
D
D
5
5
T r a n s m i t b u f f e r e m p t y f l a g ( T B E )
T r a n s m i t s h i f t c o m p l e t i o n f l a g ( T S C )
T r a n s m i t i n t e r r u p t r e q u e s t ( T I )
A d d r e s s 0 0 1 A
D
D
6
6
A d d r e s s 0 0 1 9
3886 Group
O v e r r u n e r r o r ( O E )
d e t e c t i o n
R B F = 1
T S C = 1
D
D
7
7
1 6
1 6