R5F21102DFP#U0 Renesas Electronics America, R5F21102DFP#U0 Datasheet - Page 72

• Manufacturer Part Number: R5F21102DFP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/10r

Specifications of R5F21102DFP#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: -40°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/10 Group
Rev.1.20 Jan 27, 2006
REJ09B0019-0120
Figure 12.6 TXMR Register in Event Counter Mode
Table 12.4 Event Counter Mode Specifications
Count source
Count operation
Divide ratio
Count start condition
Count stop condition
Interrupt request
generation timing
INT1/CNTR0 pin function
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 0
12.1.3 Event Counter 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 external signal fed to INT1/CNTR
Counter Mode Specifications”). Figure 12.6 shows TXMR register in event counter mode.
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
0
Item
0
page 60 of 180
1
0
External signals fed to CNTR
• Down count
• When the timer underflows, the contents in the reload register is reloaded and the count
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 interrupt]
Count source input (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.
• INT1/CNTR
B i t s y m b o l
TXOCNT
T X M O D 0
T X M O D 1
R 0 E D G
T X S
T X M O D 2
T X E D G
T X U N D
is continued
Active edge of count source can be selected with R0EDG.
_____
S y m b o l
T X M R
I N T 1 / C N T R
s w i t c h i n g b i t
0
Operation mode
select bit 0, 1
Timer X count
start flag
Set to "0" in event counter mode
Set to "0" in event counter mode
S e t t o " 0 " i n e v e n t c o u n t e r m o d e
S e t t o " 0 " i n e v e n t c o u n t e r m o d e
polarity switching function
n: set value of PREX register, m: set value of TX register
Bit name
_______
0
(1 )
p o l a r i t y
A d d r e s s
0 0 8 B
0
pin (Active edge is selected by program)
1 6
Specification
b1 b0
1 0 : Event counter mode
0 : Rising edge
1 : Falling edge
0 : Stops counting
1 : Starts counting
_____
A f t e r r e s e t
0 0
1 6
Function
0
pin (See “Table 12.4 Event
12.1 Timer (Timer X)
RW
R W
R W
R W
R W
R W
R W
R W
RW