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CHAPTER 13 8/16-BIT UP/DOWN COUNTER/TIMER
[bit5] UCRE (UDCR clear enable)
This bit is used to control UDCR clear caused by compare.
This does not affect the UDCR clear function (such as caused by the ZIN pin setting) other
than clear because of compare generation.
[bit4] RLDE (reload enable)
This bit is used to control the start of the reload function. The RCR value is transferred to
UDCR if an underflow occurs when the reload function starts.
[bit3] UDCC (UDCR clear)
This bit is used to clear UDCR. Writing "0" to this bit clears UDCR to "0000
H
".
Writing "1" has no effect.
[bit2] CGSC (counter clear/gate selection)
This bit is used to select a function of external pin ZIN.
[bit1, 0] CGE1, CGE0 (counter clear/gate edge selection)
These bits are used to select a detection edge/level for external pin ZIN.
If this bit is rewritten after its start, the count value is not assured.
UCRE
Counter clear caused by compare
0
Counter clear prohibit (initial value)
1
Counter clear permit
RLDE
Reload function
0
Reload function prohibit (initial value)
1
Reload function permit
CGSC
ZIN function
0
Counter clear function (initial value)
1
Gate function
CGE1
CGE0
For selecting the counter clear
function
For selecting the gate function
0
0
Edge detect prohibited (initial value)
Level detect prohibited (count disable)
0
1
Falling edge
"L" level
1
0
Rising edge
"H" level
1
1
Setting is prohibited
Setting is prohibited
Summary of Contents for MB90480 Series
Page 2: ......
Page 4: ......
Page 10: ...vi ...
Page 128: ...106 CHAPTER 4 RESET ...
Page 174: ...152 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 198: ...176 CHAPTER 7 MODE SETTING ...
Page 220: ...198 CHAPTER 9 TIMEBASE TIMER ...
Page 238: ...216 CHAPTER 11 WATCH TIMER ...
Page 280: ...258 CHAPTER 12 16 BIT INPUT OUTPUT TIMER ...
Page 406: ...384 CHAPTER 17 8 10 BIT A D CONVERTER ...
Page 478: ...456 CHAPTER 20 CHIP SELECTION FACILITY ...
Page 494: ...472 CHAPTER 21 ADDRESS MATCH DETECTION FUNCTION ...
Page 498: ...476 CHAPTER 22 ROM MIRROR FUNCTION SELECTION MODULE ...
Page 526: ...504 CHAPTER 23 2M 3M BIT FLASH MEMORY ...
Page 536: ...514 CHAPTER 24 EXAMPLES OF MB90F481B MB90F482B MB90F488B MB90F489B SERIAL PROGRAMMING ...
Page 570: ...548 CHAPTER 25 PWC TIMER ONLY MB90485 SERIES ...
Page 688: ......