UPD75218 NEC, UPD75218 Datasheet - Page 28

• Manufacturer Part Number: UPD75218
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

28
Note
PSW
Program counter (PC)
Stack pointer (SP)
Stack bank selection register (SBS)
Data memory (RAM)
General register (X, A, H, L, D, E, B, C)
Bank selection register (MBS, RBS)
Basic interval timer
Timer/event counter
Timer/pulse
generator
Clock timer
Serial interface
Clock generator
Interrupt
Digital port
PORT H
FIP controller/driver
Data from address 0F8H to address 0FDH in the data memory becomes undefined by RESET input.
Carry flag (CY)
Skip flag (SK0-SK2)
Interrupt status flag (IST0, IST1)
Bank enable flag (MBE, RBE)
Hardware
Counter (BT)
Mode register (BTM)
Counter (T0)
Modulo register (TMOD0)
Mode register (TM0)
Modulo register (MODH, MODL)
Mode register (TPGM)
Mode register (WM)
Shift register (SIO)
Mode register (SIOM)
Processor clock control
register (PCC)
System clock control register
(SCC)
Interrupt request flag (IRQ
Interrupt enable flag (IE
Priority specification flag (IPS)
INT0/INT1 mode register (IM0,
IM1)
Output buffer
Output latch
I/O mode register (PMGA, PMGB)
Output latch
Display mode register (DSPM)
Digit selection register (DIGS)
Dimmer selection register (DIMS)
Display data memory
Output buffer
Table 8-1 Hardware Statuses after Reset Operation
)
)
Set the low-order six bits at
address 0000H in program
memory to PC
contents of address 0001H to
PC
Set bit 6 of address 0000H in
program memory to RBE and
set bit 7 to MBE.
Set bit 4 to 1 and other bits to 0.
RESET input in standby mode
7-0
, and set PC
Retained
Cleared (0)
Undefined
Undefined
Undefined
Retained
Retained
Retained
Retained
Reset (0)
Retained
Retained
1000B
0, 0
FFH
0, 0
Off
Off
13-8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
14
, set the
Note
to zero.
RESET input during operation
Set the low-order six bits at
address 0000H in program
memory to PC
contents of address 0001H to
PC
Set bit 6 of address 0000H in
program memory to RBE and
set bit 7 to MBE.
Set bit 4 to 1 and other bits to 0.
7-0
, and set PC
Cleared (0)
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Reset (0)
1000B
FFH
0, 0
0, 0
Off
Off
13-8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
14
, set the
to zero.
PD75218