UPD784216AYGC View Datasheet(PDF) - NEC => Renesas Technology
Part Name
Description
Manufacturer
UPD784216AYGC Datasheet PDF : 100 Pages
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µPD784214A, 784215A, 784216A, 784217A, 784218A, 784214AY, 784215AY, 784216AY, 784217AY, 784218AY
6.2 CPU Registers
6.2.1 General-purpose registers
Sixteen 8-bit general-purpose registers are available. Two 8-bit registers can also be used in pairs as a 16-bit
register. Of the 16-bit registers, four can be used in combination with an 8-bit register for address expansion as 24-
bit address specification registers.
Eight banks of these register sets are available and can be selected by using software or the context switching
function.
The general-purpose registers except the V, U, T, and W registers for address expansion are mapped to the
internal RAM.
Figure 6-6. General-Purpose Register Format
A (R1)
X (R0)
AX (RP0)
B (R3)
C (R2)
BC (RP1)
R5
R4
RP2
R7
R6
RP3
V
R9
R8
VVP (RG4)
VP (RP4)
U
R11
R10
UUP (RG5)
UP (RP5)
T
D (R13)
E (R12)
TDE (RG6)
DE (RP6)
W
H (R15)
L (R14)
WHL (RG7)
HL (RP7)
Names in parentheses indicate absolute names.
8 banks
Caution Registers R4, R5, R6, R7, RP2, and RP3 can be used as the X, A, C, B, AX, and BC registers,
respectively, by setting the RSS bit of the PSW to 1. However, use this function only for
recycling the program of the 78K/III Series.
Data Sheet U14121EJ2V0DS00
29
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