Z90251 Datasheet, PDF (20/97 Pages) Zilog, Inc. – eZVision 200 Television Controllers with OSD

Z90255 ROM and Z90251 OTP
32 KB Television Controller with OSD
12
Register Pointer
D7 D6 D5 D4 D3 D2 D1 D0
Working Register
Group Pointer
Expanded Register
Bank Pointer
Z8 Register File
%FF
%F0
%7F
%0F
%00
(C)
(B)
(7) ^(A)
(6)
(5)
(4)
x = undefined
Reserved Expanded
Register
Figure 5 Register File Map
Register
%FF SPL
%FE SPH
%FD RP
%FC FLAGS
%FB IMR
%FA IRQ
%F9 IPR
%F8 P01M
%F7 P2CNTL
%F6 P2M
%F5 PRE0
%F4 T0
%F3 PRE1
%F2 T1
%F1 TMR
%F0 Reserved
Reset Condition
D7 D6 D5 D4 D3 D2 D1 D0
xxxxxxxx
xxxxxxxx
00000000
xxxxxxxx
0x xxxxxx
00000000
xxxxxxxx
11111111
00000001
11111111
xxxxxxx0
xxxxxxxx
xx xxxx00
xxxxxxxx
00000000
Expanded
Register
%(F)0F WDTMR
%(F)0E Reserved
%(F)0D Reserved
%(F)0C Reserved
%(F)0B SMR
%(F)0A Reserved
%(F)09 PWM6H
%(F)08 PWM6L
%(F)07 MC_Reg
%(F)06 MR_En
%(F)05 MC_End
%(F)04 MC_St
%(F)03 PRT6_DTA
%(F)02 PRT6_DRT
%(F)01 4ADC_DTA
%(F)00 PCON
Register
%(0)03 Reserved
%(0)02 P2
%(0)01 Reserved
%(0)00 Reserved
Register Bank (F)
Reset Condition
xx xxx1xx
00100000
xx 000000
00000000
00000000
00000000
xx x00000
xx x00000
11111111
11111111
0000xxxx
11111110
Reset Condition
xxxxxxxx
PS001301-0800