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CHAPTER 22
µ
PD78P014, 78P014Y
495
Item
µ
PD78P014, 78P014Y
Mask ROM Version
Internal ROM configuration
One-time PROM/EPROM
Mask ROM
Internal ROM capacity
32 Kbytes
µ
PD78011B, 78011BY:
8 Kbytes
µ
PD78012B, 78012BY:
16 Kbytes
µ
PD78013, 78013Y:
24 Kbytes
µ
PD78014, 78014Y:
32 Kbytes
Internal high-speed RAM capacity
1024 bytes
µ
PD78011B, 78011BY:
512 bytes
µ
PD78012B, 78012BY:
512 bytes
µ
PD78013, 78013Y:
1024 bytes
µ
PD78014, 78014Y:
1024 bytes
Internal ROM and internal high-speed
Enable
Note
Disable
RAM by memory size select register
IC pin
None
Available
V
PP
pin
Available
None
P60 to P63 pin on-chip pull-up resistor
None
Available
internal mask option
Electrical specification
Refer to the data sheet for each part number.
CHAPTER 22
µ
PD78P014, 78P014Y
The
µ
PD78P014 and 78P014Y are versions which incorporate a one-time programmable PROM or an EPROM
enabled for program write, erase and rewrite. Table 22-1 lists differences between
µ
PD78P014, 78P014Y and mask
ROM version.
Table 22-1. Differences between
µ
PD78P014, 78P014Y, and Mask ROM Version
Note
When RESET is input, the internal PROM capacity is set to 32 Kbytes, internal high-speed RAM capacity to
1024 bytes.
Caution
The noise resistance and noise radiation differs between PROM versions and mask ROM versions.
If considering replacing PROM versions with mask ROM versions during the process from trial
manufacturing to mass production, evaluate the CS versions (not ES versions) of mask ROM
versions carefully.
22.1 Internal Memory Size Switching Register
The
µ
PD78P014 and 78P014Y can select the internal memory capacity with the internal memory size switching
register (IMS). The same memory mapping as that of the mask ROM version with a different internal memory capacity
is possible by setting IMS.
In order to make the memory maps of
µ
PD78P014 and 78P014Y identical to a mask ROM version, the value at
the time the mask ROM version is reset must be set to IMS.
For the mask ROM version, IMS does not need to be set.
IMS is set with an 8-bit memory manipulation instruction.
The value of IMS becomes the value shown in Table 22-2, at RESET.
Caution
To use a mask ROM version, do not set a value other than those shown in Table 22-2 to IMS.
Summary of Contents for 78014Y Series
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Page 62: ...www DataSheet4U com CHAPTER 2 OUTLINE PD78014Y Subseries 62 MEMO...
Page 78: ...www DataSheet4U com CHAPTER 3 PIN FUNCTION PD78014 Subseries 78 MEMO...
Page 94: ...www DataSheet4U com CHAPTER 4 PIN FUNCTION PD78014Y Subseries 94 MEMO...
Page 170: ...www DataSheet4U com CHAPTER 7 CLOCK GENERATOR 170 MEMO...
Page 222: ...www DataSheet4U com CHAPTER 9 8 BIT TIMER EVENT COUNTER 222 MEMO...
Page 230: ...www DataSheet4U com CHAPTER 10 WATCH TIMER 230 MEMO...
Page 262: ...www DataSheet4U com CHAPTER 14 A D CONVERTER 262 MEMO...
Page 318: ...www DataSheet4U com CHAPTER 15 SERIAL INTERFACE CHANNEL 0 PD78014 Subseries 318 MEMO...
Page 408: ...www DataSheet4U com CHAPTER 16 SERIAL INTERFACE CHANNEL 0 PD78014Y Subseries 408 MEMO...
Page 446: ...www DataSheet4U com CHAPTER 17 SERIAL INTERFACE CHANNEL 1 446 MEMO...
Page 472: ...www DataSheet4U com CHAPTER 18 INTERRUPT FUNCTIONS AND TEST FUNCTION 472 MEMO...
Page 502: ...www DataSheet4U com CHAPTER 22 PD78P014 78P014Y 502 MEMO...
Page 520: ...www DataSheet4U com CHAPTER 23 INSTRUCTION SET 520 MEMO...