I/O Memory Of Integer Multiplier - Epson S1C63003 Technical Manual

ldb %ext, rslt_data@h
ldb %xl, rslt_data@l
nop
nop
nop
;
bit [%y], 0b0100
jrnz overflow
;
add %y, -4
;
ldb %ba, [%y]+
ldb [%x]+, %ba
ldb %ba, [%y]+
ldb [%x]+, %ba
18.6

i/O Memory of integer Multiplier

Table 18.6.1 shows the I/O addresses and the control bits for the integer multiplier.
Address Register name R/W Default
FF16H D3 MDCKe (*5)
R/W
D2 SGCKE R/W
D1 SWCKE R/W
D0 RTCKE R/W
D3 SR3
FF70H R/W
(*5) D2 SR2 R/W
D1 SR1 R/W
D0 SR0 R/W
FF71H D3 SR7 R/W
(*5) D2 SR6 R/W
D1 SR5 R/W
D0 SR4 R/W
FF72H D3 DRl3 R/W
(*5) D2 DRl2 R/W
D1 DRl1 R/W
D0 DRl0 R/W
FF73H D3 DRl7 R/W
(*5) D2 DRl6 R/W
D1 DRl5 R/W
D0 DRl4
R/W
FF74H D3 DRh3 R/W
(*5) D2 DRh2 R/W
D1 DRh1
R/W
D0 DRh0
R/W
D3 DRh7
FF75H R/W
D2 DRh6
(*5) R/W
D1 DRh5
R/W
D0 DRh4
R/W
D3 nF
FF76H
D2 VF
(*5)
D1 ZF
D0 CalMD R/W
*1 Initial value at initial reset
*4 Unused in the S1C63003/004/008
S1C63003/004/008/016 TeChniCal Manual
(Rev. 1.1)
; Set result store address
; Dummy instructions to wait end of operation
; Jump to error routine if VF = "1"
; Set DRL again
; Store result (quotient) into RAM
; Store result (remainder) into RAM
Table 18. 6.1 Control bits of integer multiplier
Setting/data
0 1 Enable
0 1 Enable
0 1 Enable
0 1 Enable
×
×
0H–FH
×
×
×
×
0H–FH
×
×
×
×
0H–FH
×
×
×
×
0H–FH
×
×
×
×
0H–FH
×
×
×
×
0H–FH
×
×
R 0 1 Negative
R 0 1 Overflow
R 0 1 Zero
0 1 Division (W)
Run (R)
*2 Not set in the circuit
*5 Unused in the S1C63003/004
Seiko epson Corporation
0 Disable Integer multiplier clock enable
0 Disable Sound generator clock enable
0 Disable Stopwatch timer clock enable
0 Disable Clock timer clock enable
Source register (low-order 4 bits)
SR0 = LSB
Source register (high-order 4 bits)
SR7 = MSB
Low-order 8-bit destination register
(low-order 4 bits)
DRL0 = LSB
Low-order 8-bit destination register
(high-order 4 bits)
DRL7 = MSB
High-order 8-bit destination register
(low-order 4 bits)
DRH0 = LSB
High-order 8-bit destination register
(high-order 4 bits)
DRH7 = MSB
0 Positive Negative flag
0 No Overflow flag
0 No Zero flag
0 Multiplication (W) Calculation mode selection (writing)
Stop (R) Operation status (reading)
*3 Constantly "0" when being read
*6 Unused in the S1C63003
18 inTeGeR MulTiPlieR
Function
18-3