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參數(shù)資料
| 型號： | UPD784916B |
| 廠商： | NEC Corp. |
| 英文描述： | 16-BIT SINGLE-CHIP MICROCONTROLLERS |
| 中文描述： | 16位單晶片微控制器 |
| 文件頁數(shù)： | 11/86頁 |
| 文件大小： | 384K |
| 代理商： | UPD784916B |
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μ
PD784915B, 784916B
11
1. DIFFERENCES AMONG
μ
PD784915 SUBSERIES PRODUCTS
The
μ
PD784915 Subseries consists of the six products listed in Table 1-1. The
μ
PD784915A is a low-cost process-
shrinked version of the
μ
PD784915. The
μ
PD784916A expands the internal ROM capacity of the
μ
PD784915 to 62
Kbytes. The
μ
PD784915B and 784916B feature improved electrical characteristics compared to the
μ
PD784915A
and 784916A.
The
μ
PD78P4916 features writable one-time PROM instead of the mask ROM of the
μ
PD784915, 784915A,
784916A, 784915B, and 784916B. Except for this substitution of PROM for ROM and the fact that PROM capacity
differs from the ROM capacities offered in the other products, the
μ
PD78P4916 has the same functions as those
products.
In switching from the PROM product, used for debugging and testing application systems, to the mask ROM
products for mass production, be careful to check the differences among these products.
For details on the CPU functions and the internal hardware, refer to
μ
PD784915 Subseries User’s Manual —
Hardware (U10444E)
.
Table 1-1. Differences among
μ
PD784915 Subseries Products
Item
μ
PD784915,
784915A
μ
PD784916A
μ
PD784915B
μ
PD784916B
μ
PD78P4916
Internal ROM
Mask ROM
49152 bytes
63488 bytes
49152 bytes
63488 bytes
63232 bytes
Note
Internal RAM
1280 bytes
2048 bytes
Note
Internal memory capacity
selection register (IMS)
Not provided
Provided
Electrical characteristics
The electrical characteristics of the
μ
PD784915A/784916A, the
μ
PD784915B/784916B,
and the
μ
PD78P4916 differ with respect to the items listed below.
P40 to P47, P50 to P57: Low-level input voltage
V
DD
supply current
Data hold current
CTL amplifier: Phase signal elimination ratio
CFG amplifier: CFGAMPO low-level output current
For details, refer to the data sheet of each product.
μ
PD784915A/784916A
Data Sheet (U11022J)
μ
PD784915B/784916B
Data Sheet (This document)
μ
PD78P4916
Data Sheet (U11045J)
Pin connections
In the
μ
PD78P4916, pin function for PROM read/write has been added.
Note
The internal PROM and internal RAM capacities can be changed using the internal memory selection register
(IMS).
Caution
The PROM version and mask ROM version differ in noise immunity and noise radiation, etc. When
considering replacing a PROM version with a mask ROM version when switching from preproduction
to volume production, perform sufficient evaluation using a CS version (not ES version) of the
mask ROM version.
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