R5F21122FP#U0 Renesas Electronics America, R5F21122FP#U0 Datasheet - Page 70

• Manufacturer Part Number: R5F21122FP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/12r

Specifications of R5F21122FP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521134EPB00 - KIT EMULATOR PROBE FOR PC7501R0E521134CPE00 - EMULATOR COMPACT R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/12 Group
Rev.1.20
REJ09B0110-0120
Table 12.2 Timer Mode Specifications
Figure 12.4 TXMR Register in Timer Mode
Count source
Count operation
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing When Timer X underflows [Timer X interruption]
INT1/CNTR
CNTR
Read from timer
Write to timer
Timer X mode register
b 7 b 6 b5 b 4 b 3 b 2 b 1 b 0
0 0
12.1.1 Timer Mode
N O T E S :
In this mode, the timer counts an internally generated count source (See “Table 12.2 Timer Mode
Specifications”). Figure 12.4 shows the TXMR register in timer mode.
1 . T h e I R b i t i n t h e I N T 1 I C r e g i s t e r m a y b e s e t t o “ 1 ” ( i n t e r r u p t r e q u e s t e d ) w h e n t h e R 0 E D G b i t i s r e w r i t t e n .
2 . T h i s b i t i s u s e d t o s e l e c t t h e p o l a r i t y o f I N T 1 i n t e r r u p t i n t i m e r m o d e .
Jan 27, 2006
0
R e f e r t o t h e p a r a g r a p h 1 9 . 2 . 5 “ C h a n g i n g I n t e r r u p t F a c t o r ” i n t h e U s a g e N o t e s R e f e r e n c e B o o k .
pin function
Item
0
0
0
pin function
0
page 58 of 181
0
f
• Down-count
• When the timer underflows, it reloads the reload register contents before continuing
1/(n+1)(m+1)
Write “1” (count start) to TXS bit in TXMR register
Write “0” (count stop) to TXS bit in TXMR register
Programmable I/O port, or INT1 interrupt input
Programmable I/O port
Count value can be read by reading TX register
Same applies to PREX register.
Value written to TX register is written to both reload register and counter.
Same applies to PREX register.
B i t s y m b o l
1
T X O C N T
TXMOD0
TXMOD1
R0EDG
T X S
T X M O D 2
TXEDG
T X U N D
counting
, f
2
S y m b o l
T X M R
, f
8
, f
32
INT1/CNTR
switching bit
O p e r a t i o n m o d e
s e l e c t b i t 2
O p e r a t i o n m o d e
s e l e c t b i t 0 , 1
T i m e r X c o u n t
s t a r t f l a g
S e t t o " 0 " i n t i m e r m o d e
S e t t o " 0 " i n t i m e r m o d e
Set to "0" in timer mode
B i t n a m e
n: set value of PREX register, m: set value of TX register
0
(1, 2)
polarity
A d d r e s s
0 0 8 B
1 6
b1 b0
0 0 : Timer mode or pulse period
0 : Rising edge
1 : Falling edge
0 : S t o p s c o u n t i n g
1 : S t a r t s c o u n t i n g
0 : Other than pulse period measurement mode
Specification
measurement mode
A f t e r r e s e t
0 0
1 6
Function
12.1 Timer (Timer X)
R W
R W
RW
RW
RW
R W
R W
R W
R W