R5F21122FP#U0 Renesas Electronics America, R5F21122FP#U0 Datasheet - Page 71

• 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 12.3 Pulse Output Mode Specifications
NOTES:
Figure 12.5 TXMR Register in Pulse Output Mode
1. The level of the output pulse becomes the level when the pulse output starts when the TX register is written to.
Count source
Count operation
Divide ratio
Count start condition
Count stop condition
Interrupt request
generation timing
INT1/CNTR
CNTR
Read from timer
Write to timer
Select function
T i m e r X m o d e r e g i s t e r
b7 b6 b5 b4 b3 b2 b1 b0
0
12.1.2 Pulse Output Mode
N O T E S :
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 .
In this mode, the timer counts an internally generated count source, and outputs from the CNTR0 pin
a pulse whose polarity is inverted each time the timer underflows (See “Table 12.3 Pulse Output mode
Specifications”). Figure 12.5 shows TXMR register in pulse output mode.
Jan 27, 2006
0
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
pin function
0 1
page 59 of 181
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
• When Timer X underflows [Timer X interruption]
Pulse output
Programmable I/O port or inverted output of CNTR
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.
• INT1/CNTR
• Inverted pulse output function
B i t s y m b o l
1
T X M O D 0
T X M O D 1
T X O C N T
T X M O D 2
(selected by TXOCNT bit)
T X E D G
T X U N D
counting
Polarity level at starting of pulse output can be selected with R0EDG bit
Inverted pulse of CNTR0 output polarity can be output from the CNTR0 pin
, f
R 0 E D G
_____
T X S
2
S y m b o l
T X M R
, f
8
, f
32
INT1/CNTR
switching bit
0
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
P 3
s e l e c t b i t
S e t t o " 0 " i n p u l s e o u t p u t m o d e
S e t t o " 0 " i n p u l s e o u t p u t m o d e
S e t t o " 0 " i n p u l s e o u t p u t m o d e
polarity switching function
0
B i t n a m e
/ C N T R
n: set value of PREX register, m: set value of TX register
0
0
(1)
A d d r e s s
polarity
0 0 8 B
1 6
b 1 b 0
0 1 : P u l s e o u t p u t m o d e
0 : C N T R
1 : C N T R
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 : P o r t P 3
1 : C N T R
Specification
A f t e r r e s e t
0
0
0
o u t p u t s t a r t s a t " H "
o u t p u t s t a r t s a t " L "
0
o u t p u t
0 0
1 6
F u n c t i o n
0
___________
12.1 Timer (Timer X)
(1)
R W
R W
R W
R W
R W
R W
R W
R W
R W