DF2238RTF6 Renesas Electronics America, DF2238RTF6 Datasheet - Page 541
DF2238RTF6
Manufacturer Part Number
DF2238RTF6
Description
MCU 2.2/3V 256K 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2200r
Datasheet
1.DF2238RFA6V.pdf
(1048 pages)
Specifications of DF2238RTF6
Core Processor
H8S/2000
Core Size
16-Bit
Speed
6MHz
Connectivity
I²C, SCI, SmartCard
Peripherals
POR, PWM, WDT
Number Of I /o
72
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
HD64F2238RTF6
HD64F2238RTF6
HD64F2238RTF6
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2238RTF6V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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13.6.3
If the PSS or CKS0 to CKS2 bits in TCSR are written to while the WDT is operating, errors could
occur in the incrementation. Software must be used to stop the watchdog timer (by clearing the
TME bit to 0) before changing the value of the PSS or CKS0 to CKS2 bits.
13.6.4
If the mode is switched from watchdog timer to interval timer while the WDT is operating, errors
could occur in the incrementation. Software must be used to stop the watchdog timer (by clearing
the TME bit to 0) before switching the mode.
13.6.5
This LSI is not reset internally if TCNT overflows while the RSTE bit is cleared to 0 during
watchdog timer operation, however TCNT_0 and TCSR_0 of the WDT_0 are reset.
TCNT, TCSR, or RSTCR cannot be written to for 132 states following an overflow. During this
period, any attempt to read the WOVF flag is not acknowledged. Accordingly, wait 132 states
after overflow to write 0 to the WOVF flag for clearing.
13.6.6
When the OVF flag setting conflicts with the OVF flag reading in interval timer mode, writing 0
to the OVF bit may not clear the flag even though the OVF bit has been read while it is 1. If there
is a possibility that the OVF flag setting and reading will conflict, such as when the OVF flag is
polled with the interval timer interrupt disabled, read the OVF bit while it is 1 at least twice before
writing 0 to the OVF bit to clear the flag.
13.6.7
When the φSUB (subckock) division clock is selected as the TCNT input clock (PSS in TCSR set
to 1) and, after TME in TCSR is cleared to 0 to initialize the counter (TCNT) while the counter
(TCNT) is operating in the high-speed mode or medium-speed mode, TCNT is restarted by setting
TME to 1 once again, TCNT may not be correctly initialized.
In such cases, use either of the following methods to initialize TCNT:
(1) Write H'00 to TCNT.
(2) In subactive mode, clear the TME bit to 0.
Internal Reset in Watchdog Timer Mode
Switching between Watchdog Timer Mode and Interval Timer Mode
OVF Flag Clearing in Interval Timer Mode
Changing Value of PSS or CKS2 to CKS0
Notes on Initializing TCNT by Using the TME Bit
Rev. 6.00 Mar. 18, 2010 Page 479 of 982
Section 13 Watchdog Timer (WDT)
REJ09B0054-0600
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