UPD78F9212CS-CAB-A Renesas Electronics America, UPD78F9212CS-CAB-A Datasheet - Page 345

• Manufacturer Part Number: UPD78F9212CS-CAB-A
• Description: MCU 8BIT 4KB FLASH 16PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9212CS-CAB-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

16-bit
timer/
event
counter
00
8-bit timer
H1
Watchdog
timer
Function
Changing
compare
register during
timer operation
External event
counter
External clock
limitation
CMP01: 8-bit
timer H
compare
register 01
CMP11: 8-bit
timer H
compare
register 11
TMHMD1: 8-bit
timer H mode
register 1
PWM output
WDTM:
Watchdog timer
mode register
Details of
Function
With the 16-bit timer capture/compare register 0n0 (CR0n0) used as a compare
register, when changing CR0n0 around the timing of a match between 16-bit timer
counter 00 (TM00) and 16-bit timer capture/compare register 0n0 (CR0n0) during
timer counting, the change timing may conflict with the timing of the match, so the
operation is not guaranteed in such cases. To change CR0n0 during timer
counting, INTTM000 interrupt servicing performs the following operation.
If CR010 is changed during timer counting without performing processing <1>
above, the value in CR010 may be rewritten twice or more, causing an inversion
of the output level of the TO00 pin at each rewrite.
The timing of the count start is after two valid edge detections.
When using an input pulse of the TI000 pin as a count clock (external trigger), be
sure to input the pulse width which satisfies the AC characteristics. For the AC
characteristics, refer to CHAPTER 19 and CHAPTER 20 ELECTRICAL
SPECIFICATIONS.
When an external waveform is input to 16-bit timer/event counter 00, it is sampled
by the noise limiter circuit and thus an error occurs on the timing to become valid
inside the device.
CMP01 cannot be rewritten during timer count operation.
In the PWM output mode, be sure to set CMP11 when starting the timer count
operation (TMHE1 = 1) after the timer count operation was stopped (TMHE1 = 0)
(be sure to set again even if setting the same value to CMP11).
When TMHE1 = 1, setting the other bits of the TMHMD1 register is prohibited.
In the PWM output mode, be sure to set 8-bit timer H compare register 11
(CMP11) when starting the timer count operation (TMHE1 = 1) after the timer
count operation was stopped (TMHE1 = 0) (be sure to set again even if setting the
same value to the CMP11 register).
In PWM output mode, the setting value for the CMP11 register can be changed
during timer count operation. However, three operation clocks (signal selected
using the CKS12 to CKS10 bits of the TMHMD1 register) or more are required to
transfer the register value after rewriting the CMP11 register value.
Be sure to set the CMP11 register when starting the timer count operation
(TMHE1 = 1) after the timer count operation was stopped (TMHE1 = 0) (be sure
to set again even if setting the same value to the CMP11 register).
Make sure that the CMP11 register setting value (M) and CMP01 register setting
value (N) are within the following range.
Set bits 7, 6, and 5 to 0, 1, and 1, respectively. Do not set the other values.
After reset is released, WDTM can be written only once by an 8-bit memory
manipulation instruction. If writing is attempted a second time, an internal reset
signal is generated. However, at the first write, if “1” and “x” are set for WDCS4
and WDCS3 respectively and the watchdog timer is stopped, then the internal
reset signal does not occur even if the following are executed.
• Second write to WDTM
• 1-bit memory manipulation instruction to WDTE
• Writing of a value other than “ACH” to WDTE
00H ≤ CMP11 (M) < CMP01 (N) ≤ FFH
APPENDIX D LIST OF CAUTIONS
User’s Manual U16994EJ6V0UD
Cautions
p. 128
p. 128
p. 129
p. 130
p. 130
p. 133
p. 133
p. 135
p. 135
p. 141
p. 141
p. 141
p. 149
p. 150
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